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Waec Gce WAEC GCE LIVE QUESTIONS AND ANSWERS 2017

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    Maths-Theory

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    ^ means Raise to power
    * means multiplication
    √ means Sqr root
    / means division or divide
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    WAEC GCE MATHEMATICS ANSWERS

    7a)
    log6Y+2log6x=3
    log6y+log6x^2=3
    log6(x^y)=3
    x^y=6^3
    x^y=216
    y=216/x^2
    7bi)
    draw
    7bii)
    percentage who liked football and volleyball but not boxing=20
    ii)percentage who liked exactly two part=40+20+10=70
    iii)summing
    5+5+10+40+20+10+5+x=100%
    x+95=100
    x=100-95=5%
    percentage who like none=5%
    ================================
    9a)
    diagrams
    9b)
    |CA|^2=300^2+100^2-2(300)(100)cos 120degree
    =9000+10000-60000(-cos60)
    =100000+30000
    KA|^2=130000
    KA|=√130000
    KA|=360.56KM
    9bii)
    Using sine rule
    |AB|/sinC=|AC|/sin120
    100/sinC=360.56
    sinC=100sin60/360.56
    sinC=0.2402
    C=sin^-1(0.2402)=13.90degree
    bearing=270+13.90=283.9degree = 284degree
    ================================
    1a)
    [2(1/2)+1(3/4)/1(2/5)]/[2(1/4)-1(1/2)]
    [5/2+7/4/7/5]/[9/4-3/2]
    =[5/2+7/4*5/7]/[9/4-3/2]
    [5/2+5/4]/[9/4-3/2]
    =[(10+5/4)/(9-6/4)]
    =(15/4)/(3/4)
    =15/4*4/3
    =5
    1b)
    From tan60/1*PR/3root2
    PR=3root2*1/root3
    =3root2/root3*root3/root3
    =3root6/3=root6
    From sin45/1*root6/x
    x=root6*root2
    =root12
    =root4*3
    =2root3
    ================================
    5a)
    Daigrams
    5b)
    Median = ((N + 1) / 2)th item Where: N = 31
    40, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 42, 42, 43, 43, 44, 44, 44, 44, 45, 45, 46, 46, 46, 46, 46, 46
    Data table
    F 7 4 6 2 4 2 6
    X 40 41 42 43 44 45 46
    Median = ((31 + 1) / 2)th item
    Median = (32 / 2)th item
    Median = 16th item
    Arranging the discrete data in ascending order, We go get:
    40, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 42, 42, 43, 43, 44, 44, 44, 44, 45, 45, 46, 46, 46, 46, 46, 46
    Median = 42
    ================================
    3)
    2x/1 - 2/5 y = 2y/1
    LCM = 5
    10x - 2y = 10y
    10x = 10y + 2y
    10x = 12y
    X = 12y/10 -------------1
    2x - 2/5y + 2 1/4x + 1/2y + 2y = 180
    LCM = 20
    40x - 8y + 45x + 10y + 40y = 3600
    40x + 45x + 10y - 8y + 50y = 3600
    95x + 42y = 3600
    95 (6y/5) + 42y =3600
    19(6y) + 42y = 3600
    114y + 42y = 3600
    156y = 3600
    Y = 3600/156
    Y = 23.08
    Sub for y in eq 1
    X = 6(23.08)/5
    X = 27.69
    ================================
    11)
    A={4,5,6,7,8,9,10,11,12}
    B={10,11,12,13,14,15,16,17,18,19,20,21,22,23,24}
    M={4,8,12,11,6,20,24,28}
    a)prob (A)=3/7
    b)prob( B)=7-4/7=3/7
    c)prob(AuB)=n(AuB)/n(m)
    but (AuB)={4,8,12,11,6,20,24,}
    prob(AuB)=6/7
    ================================
    2a)
    A=P(1+r/100)^n
    A=2,205,000
    n=2
    r=5%
    p=?
    2205000=p(1+5/100)^2
    2205000m=p(1.05)^2
    p=2205000/(1.05)^2=N2,000,000
    2b)
    area=30cm^2 h/b=3/2
    area=1/2bh
    b=2h/3
    30=1/2*2h/3*h
    2h^2=30*2*3
    h^2=30*2*3/2
    h^2=90
    h=√90=9.49m
    ================================
    4)
    area of shaded portion=area of sector pqs-area of triangle pqs
    =(θ/360*pieR^2)-(1/2r^2sinθ)
    (60/360*22/7*14^2)-(1/2*14^2sin60)
    102.2667-84.8705
    =17.796
    =17.8cm^2

    ================================
    12a)
    9x+10=28
    9x=28-10
    9x=18
    x=18/9
    x=2
    -6x+4y=4
    -6(2)+4y=4
    4y=4+12
    4y=16
    y=16/4=4

    ========================================

    (13a)
    x* y = X+Y+2xy

    (i)
    2*3 = 2+3+2(2)(3)
    = 5+12 = 17
    (2*3)*5 = 17*5
    = 17+5+2(17)(5)
    = 22+170
    = 192

    (ii)
    X*7 = x+7+2(x)7
    = 15x + 7
    X*5 = X+5+2(x)5
    = 11x + 5
    (x*5)*2 = (11x + 5)*2
    = 11x+5+2+2(11x + 5)2
    = 11x+5+2+44x+20
    = 55x + 27
    X*7 = (x*5)*2
    15x + 7 = 55x + 27
    15x – 55x = 27–7
    –40x = 20
    X = 20/-40
    X = -½


    (13b)
    PQ=8i+6j
    QR=4i+3j
    SR=3(PQ)/2 = 3/2(8i+6j)
    =12I+9j

    (i)
    RS = -SR
    =-12i-9j

    (ii)
    PQ+QR+RS
    =8i+6j+(-4i+3j)+(-12i-9j)
    =8i+6j-4i+3j-12i-9j
    = -8i

    ======================================
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    Maths-Obj

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    OBJ:
    1–10 CBACDBBDCA

    11–20 ACCBDADBDC

    21–30 BCADDABDAC

    31–40 DACBBDACCD

    41–50 ACCBDABBCD

    Check before you shade
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    Ok
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    Verified Maths-Obj

    1CCAACBADAB
    11BCCCBBBBBB
    21DDBDBCCCBA
    31BDDDCCCCCD
    41ACADADCDDC
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    WAEC GCE GEOGRAPHY ANSWERS

    1a)
    i)Availability of raw materials:In determining the location of an industry, nearness to sources of raw material is of vital importance. Nearness to the sources of raw materials would reduce the cost of production of the industry.
    ii)Availability of Labour:Adequate supply of cheap and skilled labour is necessary for and industry. The attraction of an industry towards labour centres depends on the ratio of labour cost to the total cost of production which Weber calls ‘Labour cost of Index’.
    iii)Proximity to Markets:Access to markets is an important factor which the entrepreneur must take into consideration. Industries producing perishable or bulky commodities which cannot be transported over long distance are generally located in close proximity to markets.
    iv)Transport Facilities:Transport facilities, generally, influence the location of industry. The transportation with its three modes, i.e., water, road, and rail collectively plays an important role.
    v)Power:Another factor influencing the location of an industry is the availability of cheap power. Water, wind, coal, gas, oil and electricity are the chief sources of power.

    1b)
    i)Economic Growth: This is ensured through Government ownership of some organizations&Industries Are Required
    ii)Protection of the Country’s Sovereignty: industries is sometimes meant to protect the integrity and sovereignty of the country
    iii) Distribution of resources: industries is to ensure equitable distribution of the country’s resources to make profit
    iv)Social Cost: The establishment of some industries may involve a social cost, thus ownership of such organizations becomes imperative
    v)Prevention of competition: establishing industries is to make the role and duty to ensure the success of such corporations in the interest of the public
    ================================
    5a)
    [IMG]

    5b)
    i)Low rainfall supports growth of short deciduous trees in the north
    ii)High and continuous rainfall give rise to evergreen vegetation
    iii)As rain decreases northwards, density of vegetation decreases
    5c)
    i)Cheaper Food:Most staple foods are cheap and prices tend to be predictable over time as a result of a larger food supply to meet the demands of the consumer.
    ii)Greater Variety and Availability:Because food has become cheaper to produce, farmers can invest in growing or raising more types and varieties of plants and livestock than before.
    iii)Longer Shelf-Life and Availability:Food shelf-life has been extended to increase its economic value. New techniques of food preservation, processing and packaging are being uncovered constantly.
    iv)Fewer Geographic Limitations:Farmers have greater access to water due to irrigation. They also have access to fertilizers
    ================================
    3a)
    The Economic Benefits is the improving of time performance and reduces loss and damage, thus reducing economic drag. In other words this is reducing the cost and time for existing passenger and freight movements increase transport’s contribution to economic growth
    3b)
    i)Shortage of capitalto maintain and establish new railways.
    ii)Old fashioned technologywhich make the railways carry less cargo compared to modern standard gauge
    iii)Poor government policieswhich favour development of roads instead of railways.
    3c)
    i)availability of capital to maintain and establish new railways.
    ii)New fashioned technology which make the railways carry less car go transport
    iii)availability of government policies to development railways.
    =============================================

    NO. 4a

    [IMG]

    4b)
    i)Absense of grassland
    ii)Presence of diseases
    iii)Climatic factors(hot weather)
    iv)Lack of finance
    v)Lack of animal rearing technique

    ===========================================
    2a)
    -Rural-Urban migration
    -Urban-Rural migration
    -Rural-Rural migration
    -Urban-Rural migration
    2b)
    -It brings social voices
    -It brings decline in production
    -It leads to high cost of living
    -It leads to congestion.
    2c)
    -Provisions of social amenities in rural areas
    - Provision of food
    -Provision of job
    -Provision of education.

    ================================
    6a)
    [IMG]

    6b)
    i)Air transport has indirectly helped the business to grow at and around the various airport terminals.
    ii)Another contribution of air transport which is closely related to job creation is that it aids mobility of labour.
    iii)Air transport promotes trade and commerce:- The improvement in air transport and communication worldwide has reduced the world to nothing more than a global village and it is bringing about a continuous increase in specialization.

    6c)
    i)It is not affordable for the goods as well as passengers
    ii)it is not useful for low value and bulky goods.
    iii)limited carrying capacity
    iv)It cannot be develop in the area of heavy rainfall or cold climate region.
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    Geography-Obj
    1ACBCCDBBCD
    11BBCCBAAADA
    21ACDCBCABCA
    31BCADCCBBCA
    41CCCCBADDCB
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    Biology Practical Answers Loading.



    Keep Refreshing
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    BIOLOGY PRACTICAL ANSWERS


    1a)
    i)pectoral girdle (scapula)
    ii)
    I scapula
    II )spine of scapula
    III) coracoid process
    Iv)Glenoid cavity
    V)Acromion
    VI)Acromion.
    1bi) Humerus
    1bii)Ball and socket joint
    1c)
    -It holds the upper limbs to the axial skeleton
    -Attachment of muscles.
    1d)
    I. Sunlight
    II. Oxygen
    III. Bubbles of gas
    IV. test tube
    V.funnel
    VI .water
    VII.Beaker
    VIII.Elodea
    1e)
    i)To show that oxygen is given off During photosynthesis.
    ii)
    -Sunlight
    -carbon (iv)oxide
    1f)
    i.water
    iiElodea
    iii. Photosynthesis
    iv. The oxygen can be tested by bringing a glowing splincter close to it,which will be rekindled.



    4a)
    I)Operculum
    II)Hind limb
    III)Tympanum
    IV)Trunk
    V-eye
    VI-lateral line
    VII-dorsal fin
    VIII-caudal fin

    4bi)
    Tabulate

    Vertebra
    i)they are poikilothermic or cold-blooded animal
    ii)they have fins which are used for movement in water
    iii)they have naked or moist and glandular skin with no external scales
    iv)they do not show parental care
    v)they have a two chambered heart

    Vertebrate B
    i)they are aquatic animal
    ii)they have gills which used for gaseous exchange
    iii)the skin is covered by scales but few are with out scale
    iv)they show parental care for young onces
    v)they have three chambered heart

    4bii)
    i)they both posses scale
    ii)they both posses eyes
    iii)they both posses respiratory organs

    4ci)
    A-amphibian
    B-pisces

    4cii)
    i)they posses fins which are used for movement
    ii)they posses swim bladder which posses swim bladder which enables them to maintain buoyancy in water
    iii)they posses lateral line system for detectin of vibration

    4di)
    i)they posses pigment on their skin which act as a camourplage against it predators
    ii)they posses scales on the skin which reduce water loss from the body against its predators
    iii)they posses digits or claws use for self defence

    4dii)
    i)water
    ii)land

    4diii)
    i)they are use as food
    ii)they are use for the preparation of local medication



    2a)
    A- symbiotic relationship
    B- predation
    C- symbiotic relationship
    D-epiphytsm
    E-parasitism

    2b)
    Tabulate
    Beneficial
    A,C,D
    harmful
    B,E

    (2ci)
    A and B

    (2cii)
    C and D
    2ciii)
    B

    (2d)
    A-cattle and cattle egrets
    B-Fox and hen
    C-Moss and tree
    E-Pig and tapeworm

    (2ei)
    C-Symbiotic relationships are a special type of interaction between species. Sometimes beneficial, sometimes harmful, these relationships are essential to many organisms and ecosystems, and they provide a balance that can only be achieved by working together

    (2eii)
    D-epiphytism is a form of mutualism in which one plant lives on the surface of another.
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    BIOLOGY QUESTIONS AND ANSWERS NOW AVAILABLE
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    BIOLOGY QUESTIONS AND ANSWERS NOW AVAILABLE
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    Biology answers loading.......

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    BIOLOGY OBJ AND THEORY ANSWERS

    biology-Obj
    1bacdcdbaba
    11bbbaacbdca
    21bbcabcaaaa
    31dcaacacacc
    41bccacbddad
    ================================
    Bio-Theory
    6a)
    i)it has gills for gaseous exchange
    ii)it has a long tail that facilitates its movement
    iii)its sucker secretes sticky cement which aids attachment to water weeds
    iv)it has mouth with horny jaw for feeding
    6bi)
    Irritability is the Abnormal sensitivity or excessive responsiveness, as of an organ or body part, to a stimulus.
    6bii)
    i)light
    ii)water
    6ci)
    Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning.
    6cii)
    i)it cause soil erosion
    ii)it destroys soil living organisms
    iii)it reduces soil fertility
    iv)it leads to degredation
    6d)
    the female curves her back and lift her taik in the front of the male when the male is attracted he chases and mounts the female and he pushes the base of his tail beneath that of the female and their cloacal vents come into contact
    6ei)
    Oviparity is the producing eggs that mature and hatch after being expelled from the body, as birds, most reptiles and fishes, and the monotremes.
    6eii)
    Viviparity is the retention and growth of the fertilized egg within the maternal body until the young animal, as a larva or newborn, is capable of independent existence.
    6f)
    i)ammonia
    ii)nitrate
    ================================
    3a)
    i)community is an interacting group of various species in a common location. For example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes
    ii)populationis all the organismsof the same group or species, which live in a particular geographical area, and have the capability of interbreeding.
    iii)ecological niche describes how an organism or population responds to the distribution of resourcesand competitors (for example, by growing when resources are abundant
    3b)
    i)All living organism need energy and nutrient in an environment in other to sustainlife
    ii)All living organisms need energy to maintain homeostasis
    3ci)
    i)Lack of enough food
    ii)out break of disease
    iii)lack of money
    3cii)
    i)Exposed the soil into erosion
    ii)Cause loss of nutrient into the plant
    iii)Cause low yield
    3d)
    To protect against soil erosion; improve the soil by adding organic matter, nutrients, and stability; and scavenge leftover nutrients. In other words Cover crops are used as ground cover, mulches, green manure, nurse crops, smother crops, and forage and food for animals or human
    ================================
    1a)
    i)white blood cells
    ii)lipids
    1aii)
    i)responsible for the removal of interstitial fluid from tissues
    ii)It transports white blood cells to and from the lymph nodes into the bones
    1b)
    i)oxygen
    ii)excretory products, such as carbon dioxide, urea, etc
    iii)Hormones
    1bii)
    Plants absorb water from the soil through their root hairs which are surrounded by soil water in the soil. The soil water is a more dilute solution than the soil sap inside the root hair hence water molecules move from soil water into the root hairs by the process of osmosis. Mineral salts are absorbed through the cell membrane often from a zone of their low concentration in the soil to a zone of their higher concentration in the cells of the roots through active absorption.
    1c)
    i)Placentation is the arrangement of ovules within an ovary. The part of the ovary where the ovules are attached is called a PLACENTA.
    1cii)
    i)Marginal placentation
    ii)Parietal placentation
    iii)Axile placentation
    iv)Free central placentation
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    PHYSICS THEORY ANSWERS

    SECTION-A ANS 5 ONLY
    ================================
    4a)
    Time (t)=4secs
    V=0ms^-1
    pie call,V^2=U^2+2gh
    O^2=20^2+2(-10)h
    0=400-20h
    20h/20=400/20
    h=20m
    4b)
    the magnitude of the initial speed (u) is equal to the magnitude of the height attained
    ================================
    6)
    P-type semi conductors are created by dopung an intrisic semi conductor with acceptor impurities.
    ================================
    2)
    i)used ineye surgery
    ii)used for the precise cutting of flat material
    iii)used for measuring distances
    ================================
    3)
    i)iron
    ii)steel
    iii)nickel
    ================================
    5)
    i)availability of constant sunlight
    ii)nearness to power grid
    iii)must be closer to both skilled and unskilled labour
    ================================

    SECTION-B ANS 3 ONLY
    8a)
    force is a push or pull which changes a body state of rest or of uniform motion in a straight time
    8aii)
    i)constant force
    ii)field force
    8bi)
    bodies are streamline to make sure that the surface are in head on contact with the fluid during motion
    8bii)
    i)aircrafts
    ii)ship
    8ci)
    diagrams
    8cii)
    mass of bucket =1.3kg
    speed of loop(v)=7.0ms^-1
    radius(s)=1.2m
    (x)acceleration (a)
    a=rw^2
    v=rw
    w=v/r
    a=r(v/r)^2
    a=rv^2/r^2
    a=v^2/r
    a=(2.0)^2/1.2=49/1.2
    a=40.8ms^-2
    b)net force (F)
    F=F1-Fg
    F=Ma-Mg
    F=(1.3*40.8)-1.3*19i
    F=53-04-13
    F=40N
    ===============================
    11a)
    i)hammering method
    ii)electrical method

    11b)
    electrical line of force- this is the line drawn such that the tangent to it at a given point is in the direction of the force acting on a small positive change at the point

    11c)
    diagrams
    at beaker point
    potential different accross Q=p d are p
    IiQ=I2------eq1
    p d across = p d across R
    IiS=I2R------eq2
    divide eq 1by2
    IiQ/IiS=I2P/I2R
    R=SP/Q

    11d)
    resistivity- this is the resistance of a wire unit length and unit cross-sectional area
    i;e P=RA/L

    11e)
    Given: F = 50Hz
    L = 10 mH (10×10^-³H)
    Inductive reactance, XL = 2πFL
    = 2×3.14×50×10×10^-³
    = 3..14 ohms

    11f)
    If voltmeter reads 12V, over the 500 ohms, then using I = V/R
    current in the circuit is I = 12/500
    I = 0.024A
    Hence over the 200 ohms, V = IR
    V = 0.024×200
    V = 4.8 VOLTS
    Voltmeter will read 4.8 volts
    ================================
    9a)
    i)Poor conductors of heat application
    ii)Coat (Trapped air in between the fabric

    9b)
    Renewable: Water, corn stalk
    Non-renewable: coal, natural gas

    9c)
    A closed is a physical system so far removed from other systems that it does not interact with them.

    9d)
    heat required to melt = mc∆ + ml
    Not sure of the temperature given, if it is -3°C or -5°C, However, *Using -3°C*
    Heat = (0.1×2200×3)+(0.1×2.26×10^6)
    = 226660 J

    9ei)
    Given: 75 heart beats in 1 min
    Therefore in 1 hour, we have (75×60) heart beats = 4500 heart beats
    Also given: 2J of energy is expended in 1 heart beat
    Therefore for 4500 heart beats, energy expended = (4500×2) J = 9000J

    9eii)
    Energy = mc∆
    9000 = (0.25×4200×∆)
    9000 = 1050∆
    ∆ = 9000/1050
    Temperature rise = 8.57°C
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    Verified Physics Obj

    1ABABDBBBBC
    11CCCDADCABA
    21BCBCCBDACD
    31ADBCDACBBB
    41CCBAACACCB
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    Geography Answers loading............
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    Geography​-Practical-Answers


    4a)
    solar system is the collection of eight planets and their moons in orbit round the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets

    4bi)
    i)Mercury is the innermost of the eight planets in our Solar System. It is the second densest major body in the solar system after Planet Earth and its density is slightly less than the density of Earth.
    ii)It orbits the Sun once in about 88 Earth days.
    iii)Its diameter is 4,878km at its equator, which is about two-fifths of Earth's diameter

    4bii)
    i)Composition
    The composition of the Earth consists of the solid and liquid portion and the atmosphere or gaseous portion.
    ii)The earth is spherical in shape
    iii)Size
    The diameter of the Earth at the equator is 12,756 km (7,926 miles), and its circumference or distance around the Earth at the equator is 40,075 km (24,901 miles).
    ================================
    7a)
    -Precipitation
    -Humidity
    -Temperature

    7b)
    -Elevation or Altitude effect climate. Normally, climatic conditions become colder as altitude increases.
    -Prevailing global wind patterns
    -Topography

    7c)
    -Climate causes flood which destroy plants and buildings
    -Climate causes heat waves
    -Climate causes drought
    ================================

    6a)
    Delta is a triangular tract of sediment deposited at the mouth of a river, typically where it diverges into several outlets.

    6b)
    -The presence of a large catchment, or drainage, basin (the area where all run-off water drains to the river). The top 30 river deltas all have catchment basins in excess of 1,000,000 sq km.
    - They all are at the mouth of large river systems that carry large quantities of clastic sediments (soils or portions of rocks that have been moved by water from where they formed).
    -They are not near geologically active coastlines. In order to have a large catchment basin, a very complex tributary system is necessary. These long, complex systems take a long time to develop, so they are very rarely situated on tectonically active coasts.

    6c) -The river must have large load. This will be possible if there is active erosion in the upper and middle stages.
    -There should not be extensive deposition in the middle stage e.g. presence of lake in between or high evaporation rate (first).
    -The river’s load must be deposited faster than it can be removed by the action of currents and tides.
    =================================

    1a)
    old scale; 150,000
    new scale; 1/50,000*1/3=1/150,000
    new scale; 1;150,000
    old length=36cm
    old breath=36cm
    new length=1/3*36cm=12cm
    new breath=1/3*36cm=12
    =12cm
    1b)
    diagrams


    1c)
    the map distance =33cm
    the new scale becomes 1/3*33cm=11cm
    the ground is = 100,000*11=110,000km
    1d)
    The road network on the mapped area consist of class 1 road which moves from road camp in the southern part and moves through the western part and class 2 and 3 road connected at duayaw-nkwanta and nodal town and pass through susanlo to north west another interchange to dwommo a nodal town and moves to bechem and techimantia which is a commercial area
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    Friday, 15th September, 2017


    Chemistry 3 (Alternative to Practical Work)

    9.30am – 11.00am


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    Chemistry practical answers loading..........
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