Mathematics 2021 Past Questions | JAMB

Study the following Mathematics past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

16.  P(-6, 1) and Q(6, 6) are the two ends of the diameter of a given circle. Calculate the radius.

  • A. 6.5 units
  • B. 13.0 units
  • C. 3.5 units
  • D. 7.0 units

17.  The angle of a sector of s circle, radius 10.5cm, is 48°, Calculate the perimeter of the sector

  • A. 8.8cm
  • B. 25.4cm
  • C. 25.6cm
  • D. 29.8cm

18. Find the length of a side of a rhombus whose diagonals are 6cm and 8cm

  • A. 8cm
  • B. 5cm
  • C. 4cm
  • D. 3cm

19. Each of the interior angles of a regular polygon is 140°. How many sides has the polygon?

  • A. 9
  • B. 8
  • C. 7
  • D. 5

20. A cylinder pipe, made of metal is 3cm thick. If the internal radius of the pope is 10cm. Find the volume of metal used in making 3m of the pipe.

  • A. 153πcm3
  • B. 207πcm3
  • C. 15300πcm3
  • D. 20700πcm3

21. The locus of a point which moves so that it is equidistant from two intersecting straight lines is the?

  • A. perpendicular bisector of the two lines
  • B. angle bisector of the two lines
  • C. bisector of the two lines
  • D. line parallel to the two lines

22. 4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the bisectors representing all numbers equals to or greater than 16

  • A. 48o
  • B. 84o
  • C. 92o
  • D. 276o

23. The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number

  • A. 3
  • B. 16
  • C. 38
  • D. 30

24. Two numbers are removed at random from the numbers 1, 2, 3 and 4. What is the probability that the sum of the numbers removed is even?

  • A. 2/3
  • B. 2/15
  • C. 1/2
  • D. 1/4

25. Find the probability that a number selected at random from 41 to 56 is a multiply of 9

  • A. 1/8
  • B. 2/15
  • C. 3/16
  • D. 7/8

26. Musa borrows N10.00 at 2% per month simple interest and repays N8.00 after 4 months. How much does he still owe?

  • A. N10.80
  • B. N10.67
  • C. N2.80
  • D. N2.67

27.  Simplify 2log2/5  – log72/125 + log 9

  • A. 1 – 4 log3
  • B. -1 + 2 log 3
  • C. -1 + 5 log2
  • D. 1 – 2log 2

28.  A car travels from calabar to Enugu, a distance of P km with an average speed of U km per hour and continues to benin, a distance of Q km, with an average speed of Wkm per hour. Find its average speed from Calabar to Benin

  • A. (\frac{(p + q)}{pw + qu}\)
  • B. \(\frac{uw(p + q)}{pw + qu}\)
  • C. \(\frac{uw(p + q)}{pw}\)
  • D. \(\frac{uw}{pw + qu}\)

29. If w varies inversely as  uv / v+u and is equal to 8 when

u = 2 and v = 6, find a relationship between u, v, w.

  • A. uvw = 16(u + v)
  • B. 16uv = 3w(u + v)
  • C. uvw = 12(u + v)
  • D. 12uvw = u + v

30.  If g(x) = x2+ 3x  find g(x + 1) – g(x)

  • A. (x + 2)
  • B. 2(x + 2)
  • C. (2x + 1)
  • D. (x2 + 4)
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