WAEC - Mathematics (2013)

  • 1
    Multiply 2.7 x 10-4 by 6.3 x 106 and leave your answers in standard form
    отговор
    (C)
    1.701 x 103
  • 2
    If 9(2 - x) = 3, find x
    отговор
    (B)
    \(\frac{3}{2}\)
  • 3
    In what number base is the addition 465 + 24 + 225 = 1050?
    отговор
    (D)
    seven
  • 4
    Simplify \(\frac{1\frac{7}{8} \times 2\frac{2}{5}}{6\frac{3}{4} \div \frac{3}{4}}\)
    отговор
    (D)
    \(\frac{1}{2}\)
  • 5
    If Un = n(n2 + 1), evaluate U5 - U4
    отговор
    (C)
    62
  • 6
    If \(\sqrt{50} - K\sqrt{8} = \frac{2}{\sqrt{2}}\), find K
    отговор
    (D)
    2
  • 7
    A sales boy gave a change of N68 instead of N72. Calculate his percentage error
    отговор
    (B)
    5\(\frac{5}{9}\)%
  • 8
    Four oranges sell for Nx and three mangoes sell for Ny. Olu bought 24 oranges and 12 mangoes. How much did he pay in terms of x and y?
    отговор
    (B)
    N(6x + 4y)
  • 9
    Simplify: \(\frac{x^2 - y^2}{(x + y)^2} \div \frac{(x - y)^2}{(3x + 3y)}\)
    отговор
    (C)
    \(\frac{3}{x - y}\)
  • 10
    Solve the inequality: \(\frac{2x - 5}{2} < (2 - x)\)
    отговор
    (D)
    x < 2\(\frac{1}{4}\)
  • 11
    If x = 64 and y = 27, evaluate: \(\frac{x^{\frac{1}{2}} - y^{\frac{1}{3}}}{y - x^{\frac{2}{3}}}\)
    отговор
    (C)
    \(\frac{5}{11}\)
  • 12
    If \(\frac{1}{2}\)x + 2y = 3  and \(\frac{3}{2}\)x - 2y = 1, find (x + y)
    отговор
    (A)
    3
  • 13
    Given that \(p^{\frac{1}{3}}\) = \(\frac{\sqrt[3]{q}}{r}\), make q the subject of the equation
    отговор
    (C)
    q = pr3
  • 14
    A chord is 2cm from the centre of a circle. If the radius of the circle is 5cm, find the length of the chord
    отговор
    (A)
    2\(\sqrt{21}\)cm
  • 15
    A cube and cuboid have the same base area. The volume of the cube is 64cm\(^3\) while that of the cuboid is 80cm\(^3\). Find the height of the cuboid
    отговор
    (C)
    5cm
  • 16
    If sin x = \(\frac{5}{13}\) and 0o \(\leq\) x \(\leq\) 90o, find the value of (cos x - tan x)
    отговор
    (C)
    \(\frac{79}{156}\)
  • 17
    An object is 6m away from the base of a mast. The angle of depression of the object from the top pf the mast is 50o, Find, correct to 2 decimal places, the height of the mast
    отговор
    (C)
    7.15m
  • 18
    The bearing of Y from X is 060º and the bearing of Z from Y = 060º. Find the bearing of X from Z
    отговор
    (B)
    240o
  • 19
    Which of the following is not a probability of Mary scoring 85% in a mathematics test?
    отговор
    (D)
    1.01
  • 20
    If 2 log x (3\(\frac{3}{8}\)) = 6, find the value of x
    отговор
    (A)
    \(\frac{3}{2}\)
  • 21
    If p = (y : 2y \(\geq\) 6) and Q = (y : y -3 \(\leq\) 4), where y is an integer, find p\(\cap\)Q
    отговор
    (C)
    {3, 4, 5, 6, 7}
  • 22
    Find the values of k in the equation 6k2 = 5k + 6
    отговор
    (B)
    {\(\frac{-2}{3}, \frac{3}{2}\)}
  • 23
    If y varies directly as the square root of (x + 1) and y = 6 when x = 3, find x when y = 9 
    отговор
    (A)
    8
  • 24
    The graph of the relation y = x2 + 2x + k passes through the point (2, 0). Find the values of k
    отговор
    (D)
    -8
  • 25
    What is the locus of the point X which moves relative to two fixed points P and M on a plane such that < PXM = 30o
    отговор
    (B)
    an arc of a circle with PM as a chord
  • 26
    When a number is subtracted from 2, the result equals 4 less than one-fifth of the number. Find the number
    отговор
    (C)
    5
  • 27
    Express \(\frac{2}{x + 3} - \frac{1}{x - 2}\) as a simple fraction
    отговор
    (A)
    \(\frac{x - 7}{x^2 + x - 6}\)
  • 28
    An interior angle of a regular polygon is 5 times each exterior angle. How many sides has the polygon?
    отговор
    (B)
    12
  • 29
    Given that P = x2 + 4x - 2, Q = 2x - 1 and Q - p = 2, find x
    отговор
    (B)
    -1
  • 30
    A pyramid has a rectangular base with dimensions 12m by 8m. If its height is 14m, calculate the volume
    отговор
    (B)
    448m3
  • 31
    The slant height of a cone is 5cm and the radius of its base is 3cm. Find, correct to the nearest whole number, the volume of the cone. ( Take \(\pi = \frac{22}{7}\))
    отговор
    (C)
    38cm3
  • 32
    The distance between two towns is 50km. It is represented on a map by 5cm. Find the scale used
    отговор
    (A)
    1: 1,000,000
  • 33
    Given that (x + 2)(x2 - 3x + 2) + 2(x + 2)(x - 1) = (x + 2) M, find M
    отговор
    (D)
    x2 - x
  • 34
    An open cone with base radius 28cm and perpendicular height 96cm was stretched to form sector of a circle. calculate the arc of the sector (Take \(\pi = \frac{22}{7}\))
    отговор
    (A)
    8800cm2
  • 35

    In the diagram, PRST is a square. If |PQ| = 24cm. |QR| = 10cm and < PQR = 90o, find the perimeter of the polygon PQRST.

    отговор
    (A)
    112cm
  • 36
    in the diagram, the height of a flagpole |TF| and the length of its shadow |FL| re in the ratio 6:8. Using k as a constant of proportionality, find the shortest distance between T and L
    отговор
    (B)
    10K units
  • 37
    In the diagrams, |XZ| = |MN|, |ZY| = |MO| and |XY| = |NO|. Which of the following statements is true?
    отговор
    (D)
    \(\bigtriangleup\) XYZ= \(\bigtriangleup\) NOM
  • 38

    In the diagram, PQRS is a rhombus and < PSQ = 35º. Calculate the size of < PRQ

    отговор
    (B)
    55o
  • 39
    Find the value of m in the diagram
    отговор
    (D)
    17o
  • 40

    In the diagram, O is the centre of the circle. OM||XZ and < ZOM = 25º. Calculate ∠XYZ

    отговор
    (D)
    65o
  • 41

    Using the histogram, estimate the mode of distribution

    отговор
    (C)
    53.5
  • 42

    Using the histogram, what is the median class?

    отговор
    (C)
    40.5 - 50.5
  • 43

    The pie chart shows the distribution of 600 mathematics textbooks for Arts, Business, Science and Technical Classes. How many textbooks are for the technical class?

    отговор
    (D)
    250
  • 44

    The pie chart shows the distribution of 600 mathematics textbooks for Arts, Business, Science and Technical Classes. What percentage of the total number of textbooks belongs to science?

    отговор
    (A)
    12\(\frac{1}{2}\)%
  • 45
    In the diagram, PQRST is a regular polygon with sides QR and TS produced to meet at V. Find the size of < RVS
    отговор
    (A)
    36o