WAEC - Mathematics (2012)

  • 1
    Express 302.10495 correct to five significant figures
    Відповідь
    (A)
    302.10
  • 2
    Simplify; \(\frac{3\sqrt{5} \times 4\sqrt{6}}{2 \sqrt{3} \times 3\sqrt{2}}\)
    Відповідь
    (D)
    2\(\sqrt{5}\)
  • 3
    In 1995, the enrollment of two schools X and Y were 1,050 and 1,190 respectively. Find the ration of the enrollments of X and Y
    Відповідь
    (B)
    15:17
  • 4
    Convert 3510 to number in base 2
    Відповідь
    (C)
    100011
  • 5
    The nth term of a sequence is Tn = 5 + (n - 1)2. Evaluate T4 - T6
    Відповідь
    (C)
    -16
  • 6
    Mr. Manu travelled from Accra to Pamfokromb a distance of 720km in 8 hours. What will be his speed in m/s?
    Відповідь
    (A)
    25m/s
  • 7
    If N2,500.00 amounted to N3,50.00 in 4 years at simple interest, find the rate at which the interest was charged
    Відповідь
    (D)
    10%
  • 8
    Solve for x in the equation; \(\frac{1}{x} + \frac{2}{3x} = \frac{1}{3}\)
    Відповідь
    (A)
    5
  • 9
    Simplify: \(\frac{54k^2 - 6}{3k + 1}\)
    Відповідь
    (C)
    6(3k - 1)
  • 10
    Make p the subject of the relation: q = \(\frac{3p}{r} + \frac{s}{2}\)
    Відповідь
    (D)
    p = \(\frac{2qr - rs}{6}\)
  • 11
    If x + y = 2y - x + 1 = 5, find the value of x
    Відповідь
    (B)
    2
  • 12
    The sum of 12 and one third of n is 1 more than twice n. Express the statement in the form of an equation
    Відповідь
    (D)
    5n - 33 = 0
  • 13
    Solve the inequality: \(\frac{-m}{2} - \frac{5}{4} \geq \frac{5m}{12} - \frac{7}{6}\)
    Відповідь
    (C)
    m \(\leq - \frac{1}{11}\)
  • 14
    The curved surface area of a cylindrical tin is 704cm2. If the radius of its base is 8cm, find the height. [Take \(\pi = \frac{22}{7}\)]`
    Відповідь
    (A)
    14cm
  • 15
    The lengths of the minor and major arcs 54cm and 126cm respectively. Calculate the angle of the major sector
    Відповідь
    (B)
    252o
  • 16
    In \(\bigtriangleup\) XYZ, /XY/ = 8cm, /YZ/ = 10cm and /XZ/ = 6cm. Which of these relation is true?
    Відповідь
    (D)
    /YZ/2 = /XZ/2 + /XY/2
  • 17
    If cos(x + 40)o = 0.0872, what is the value of x?
    Відповідь
    (D)
    45o
  • 18
    A kite flies on a taut string of length 50m inclined at tan angle 54o to the horizontal ground. The height of the kite above the ground is
    Відповідь
    (B)
    50 sin 54o
  • 19
    Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21, calculate the standard deviation of the scores
    Відповідь
    (C)
    5
  • 20
    A bag contains 4 red and 6 black balls of the same size. If the balls are shuffled briskly and two balls are drawn one after the other without replacement, find the probability of picking balls of different colours
    Відповідь
    (A)
    \(\frac{8}{15}\)
  • 21
    Which of these statements about y = \(\sqrt{8m}\) is correct?
    Відповідь
    (D)
    log y = \(\frac{3}{2}\) log 2 + \(\frac{1}{2}\) log m
  • 22
    If x + 0.4y = 3 and y = \(\frac{1}{2}\)x, find the value of (x + y)
    Відповідь
    (C)
    3\(\frac{3}{4}\)
  • 23
    Express 3 - [\(\frac{x - y}{y}\)] as a single fraction
    Відповідь
    (C)
    \(\frac{4y - x}{y}\)
  • 24
    If p = {prime factors of 210} and Q = {prime less than 10}, find p \(\cap\) Q
    Відповідь
    (D)
    {2,3,5,7}
  • 25
    Alfred spent \(\frac{1}{4}\) of his money on food, \(\frac{1}{3}\) on clothing and save the rest. If he saved N72,20.00, how much did he spend on food?
    Відповідь
    (A)
    N43,200.00
  • 26
    Solve (\(\frac{27}{125}\))-\(\frac{1}{3}\) x (\(\frac{4}{9}\))\(\frac{1}{2}\)
    Відповідь
    (A)
    \(\frac{10}{9}\)
  • 27
    The sum of the interior angles of regular polygon is 1800o. How many sides has the polygon?
    Відповідь
    (B)
    12
  • 28
    Find the coefficient of m in the expression of (\(\frac{m}{2} - 1 \frac{1}{2}\)) (m + \(\frac{2}{3}\))
    Відповідь
    (D)
    -1\(\frac{1}{6}\)
  • 29
    The volume of a cuboid is 54cm3. If the length, width and height of the cuboid are in the ratio 2:1:1 respectively, find its total surface area
    Відповідь
    (B)
    90cm2
  • 30
    A side and a diagonal of a rhombus are 10cm and 12cm respectively, Find its area
    Відповідь
    (D)
    96cm2
  • 31
    Factorise completely: 32x2y - 48x3y3
    Відповідь
    (A)
    16x2y(2 - 3xy2)
  • 32
    If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?
    Відповідь
    (B)
    y = \(\frac{k}{x}\)
  • 33
    If x and y are variables and k is a constant, which of the following describes an inverse relationship between x and y?
    Відповідь
    (B)
    y = \(\frac{k}{x}\)
  • 34
    In the diagram, |QR| = 10m, |SR| = 8m

    < QPS = 30o, < QRP = 90o and |PS| = x, Find x
    Відповідь
    (C)
    9.32m
  • 35
    In the diagram, O is a circle centre of the circle PQRS and < PSR = 86o. If < PQR = xo, find x
    Відповідь
    (B)
    172o
  • 36
    The diagram is a circle centre O. If < SPR = 2m and < SQR = n, express m in terms of n
    Відповідь
    (A)
    m = \(\frac{n}{2}\)
  • 37
    In the diagram, MQ//RS, < TUV = 70o and < RLV = 30o. Find the value of x
    Відповідь
    (C)
    100o
  • 38

    Is the diagram, MN, PQ and RS are three intersecting straight lines. Which of the following statements is/are true? i. t = y ii. x + y + z + m = 180o iii. x + m + n = 180o iv. x + n = m + z

    Відповідь
    (C)
    iii
  • 39

    The position of three ships P,Q and R at sea are illustrated in the diagram. The arrows indicated the North direction. The bearing of Q from P is 050o and < PQR = 72o. Calculate the bearing of R and Q

    Відповідь
    (C)
    158o
  • 40
    The bar chart shows the frequency distribution of marks scored by students in a class test. How many students are in the class?
    Відповідь
    (C)
    25
  • 41
    The bar chart shows the frequency distribution of marks scored by students in a class test. Calculate the mean of the distribution.
    Відповідь
    (C)
    2.4
  • 42
    The bar chart shows the frequency distribution of marks scored by students in a class test. What is the median of the distribution?
    Відповідь
    (A)
    2
  • 43
    The graph is that of y = 2x2 - 5x - 3. For what value of x will y be negative? What is the gradient of y = 2x2 - 5x - 3 at the point x = 4?
    Відповідь
    (A)
    11.1
  • 44

    In the diagram, MN//PO, < PMN = 112º, < PNO = 129º, < NOP = 37º and < MPN = yo. Find the value of y

    Відповідь
    (B)
    54o
  • 45
    The diagram is a circle with centre P. PRST are points on the circle. Find the value of < PRS
    Відповідь
    (A)
    144o