WAEC - Mathematics (2021)

  • 1
    correct 0.007985 to three significant figures.
    პასუხი
    (C)
    0.00799
  • 2
    Simplify: (11\(_{two}\))\(^2\)
    პასუხი
    (A)
    1001\(_2\)
  • 3
    Solve: 2\(^{\sqrt{2x + 1}}\) = 32
    პასუხი
    (C)
    12
  • 4
    If log\(_{10}\) 2 = m and log\(_{10}\) 3 = n, find log\(_{10}\) 24 in terms of m and n.
    პასუხი
    (A)
    3m + n
  • 5
    Find the 5th term of the sequence 2,5,10,17....?
    პასუხი
    (D)
    26
  • 6
    if p = {-3<x<1} and Q = {-1<x<3}, where x is a real number, find P n Q.
    პასუხი
    (A)
    0
  • 7
    Factorize 6pq-3rs-3ps+6qr
    პასუხი
    (C)
    3(2q - s)(p + r)
  • 8
    What number should be subtracted from the sum of 2 \(\frac{1}{6}\) and 2\(\frac{7}{12}\) to give 3\(\frac{1}{4}\)?
    პასუხი
    (B)
    1\(\frac{1}{2}\)
  • 9
    Mensah is 5 years old and joyce is thrice as old as mensah. In how many years will joyce be twice as old as Mensah?
    პასუხი
    (C)
    5 years
  • 10
    If 16 * 2\(^{(x + 1)}\) = 4\(^x\) * 8\(^{(1 - x)}\), find the value of x.
    პასუხი
    (D)
    -1
  • 11
    The circumference of a circular track is 9km. A cyclist rides round it a number of times and stops after covering a distance of 302km. How far is the cyclist from the starting point?
    პასუხი
    (A)
    5km
  • 12
    Simplify 2√7- \(\frac{14}{√7} + \frac{7}{√21}\)
    პასუხი
    (C)
    \(\frac{√21}{3}\)
  • 13
    If 4x+2y=16 and 6x-2y=4 , find the value of (y-x).
    პასუხი
    (B)
    2
  • 14

     In the diagram, ∠ABC and ∠BCD are right angles, ∠BAD = t and ∠EDF = 70°. Find the value of t.

    პასუხი
    (D)
    110°
  • 15
    The sum of the interior angles of a regular polygon with k sides is (3k-10) right angles. Find the size of the exterior angle?
    პასუხი
    (A)
    60°
  • 16
    make u the subject in x =\(\frac{2u-3}{3u + 2}\)
    პასუხი
    (C)
    u = \(\frac{2x + 3}{2 - 3x}\)
  • 17
     A trader paid import duty of 38 kobo in the naira on the cost of an engine. If a total of #22,800.00 was paid as import duty, calculate the cost of the engine.
    პასუხი
    (A)
    #60,000.00
  • 18
    The height of an equilateral triangle of side is 10 3√ cm. calculate its perimeter.
    პასუხი
    (B)
    60cm
  • 19

    In △LMN, |LM| = 6cm, ∠LNM = x and sin x = sin x = \(\frac{3}{5}\).

    Find the area of △LMN 

    პასუხი
    (C)
    24cm\(^2\)
  • 20

    consider the statements:

    P = All students offering Literature(L) also offer History(H);

    Q = Students offering History(H) do not offer Geography(G).

    Which of the Venn diagram correctly illustrate the two statements?

    პასუხი
    (C)
    C
  • 21
    Find The quadratic Equation Whose Roots Are -2q And 5q. 
    პასუხი
    (D)
    x\(^2\) - 3qx - 10q\(^2\)
  • 22
    if tanθ = \(frac{3}{4}\), 180° < θ < 270°, find the value of cosθ.
    პასუხი
    (C)
    -\(\frac{4}{5}\)
  • 23
    If  \(\frac{2}{x-3}\) - \(\frac{3}{x-2}\) = \(\frac{p}{(x-3)(x -2)}\), find p.
    პასუხი
    (A)
    5 - x
  • 24
    The diagonal of a rhombus are 12cm and 5cm. calculate its perimeter
    პასუხი
    (A)
    26cm
  • 25

    In the diagram, △XYZ is produced to T. if |XY| = |ZY| and ∠XYT = 40°, find ∠XZT

    პასუხი
    (A)
    110°
  • 26
    A solid brass cube is melted and recast as a solid cone of height h and base radius r. If the height of the cube is h, find r in terms of h.
    პასუხი
    (B)
    r = √\(\frac{3h^2}{π}\)
  • 27
    Which of the following is not an exterior angle of a regular polygon?
    პასუხი
    (A)
    66°
  • 28
    From a point T, a man moves 12km due west and then moves 12km due south to another point Q. Calculate the bearing of T from Q.
    პასუხი
    (C)
    045°
  • 29

    In the diagram, O is the centre of the circle PQRS, ∠PQR = 72° and OR is parallel to PS. Find ∠ OPS.

    პასუხი
    (D)
    36°
  • 30

    A trapezium of parellel sides 10cm and 21cm and height 8cm is inscribed in a circle of radius 7cm. calculate the area of the region not covered by the trapezium.

    π =\(\frac{22}{7}\) 

    პასუხი
    (C)
    30cm\(^2\)
  • 31
    Find, correct to two decimal, the mean of 1\(\frac{1}{2}\), 2\(\frac{2}{3}\), 3\(\frac{3}{4}\), 4\(\frac{4}{5}\), and 5\(\frac{5}{6}\).
    პასუხი
    (A)
    3.71
  • 32

     A cyclist moved at a speed of Xkm/h for 2 hours. He then increased his speed by 2 km/h for the next 3 hours.

    If the total distance covered is 36 km, calculate his initials speed.

    პასუხი
    (D)
    6km/h
  • 33

    find the value of (x+y)

    პასუხი
    (A)
    215°
  • 34

    In the diagram, \(\overline{MP}\) is a tangent to the circle NQR, ∠NQR, ∠PNQ = 64 and | \(\overline{RQ}\) | = | \(\overline{RN}\) |. Find the angle market t. 

    პასუხი
    (C)
    58°
  • 35
    find the first quartile of 7,8,7,9,11,8,7,9,6 and 8.
    პასუხი
    (B)
    7.0
  • 36

    In the diagram, PQRS is a circle. find the value of x.

    პასუხი
    (A)
    50°
  • 37
    A cone has a base radius of 8cm and height 11cm. calculate , correct to 2d.p, the curved surface area
    პასუხი
    (A)
    341.98cm\(^2\)
  • 38

    Given that sin x = \(\frac{3}{5}\), 0 ≤ x ≤ 90, evaluate (tan x + 2cosx)

     

    პასუხი
    (B)
    2\(\frac{7}{20}\)
  • 39

    In the diagram, line \(\overline{EC}\) is a diameter of the circle ABCDE.

    If angle ABC equals 158°, find ∠ADE

    პასუხი
    (C)
    68
  • 40
    Height(cm) 160 161 162 163 164

    165

    No. of players 4 6 3 7 8 9

    the table shows the height of 37 players of a basketball team calculates correct to one decimal place the mean height of the players.

    პასუხი
    (A)
    163.0
  • 41
    \(\overline{XY}\) is a line segments with the coordinates X (- 8,- 12) and Y(p,q). if the midpoint of \(\overline{XY}\)  is (-4,-2) find the coordinates of Y.
    პასუხი
    (B)
    (0,8)
  • 42
    500 tickets were sold for a concert tickets for adults and children were sold at $4.50 and $3.00  respectively if the total receipts for the concerts was $1987.50 how many tickets for adults were sold?
    პასუხი
    (A)
    325
  • 43

    The distance d between two villages east more than 18 KM but not more than 23KM.

    which of these inequalities represents the statements?

    პასუხი
    (D)
    18 < d ≤ 23
  • 44

    The pie chart represents the distribution of fruits on display in the shop if there are 60 apples on display how many oranges are there? 

    პასუხი
    (D)
    90
  • 45
    A box contains 40 identical balls of which 10 are red and 12 are blue. if a ball is selected at random from the box what is the probability that it is neither red nor blue?
    პასუხი
    (A)
    \(\frac{9}{20}\)