Mathematics 2021 Past Questions | WAEC

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.

  1. Correct, 0.00798516 to three significant figures
  • A. 0109
  • B. 0800
  • C. 00799
  • D. 0.008

2.  Simplify (11two)2

  • A. 1001two
  • B. 1101two
  • C. 101two
  • D. 10001two

3.  Solve = 2\(^\sqrt{2x+1}\) = 32

  • A. 13
  • B. 24
  • C. 12
  • D.11

4. If log102 =m and log103 =n, find log1024  In term of m and n.

  • A. 3m+n
  • B. m+3n
  • C. 4mn
  • D. 3mn

5. Find the 5th term of the sequence 5, 10, 17, …….

  • A. 22
  • B. 24
  • C. 36
  • D. 26

6. If P = {-3<x<1} and Q ={-1<x<3}, where x is a real number find, P n Q.

  • A. {-1<x<1}
  • B. {-3<x<1}
  • C. {-1<x<1}
  • D. {-1<x<1}

7.  Factorize 6pq-3rs-3ps + 6qr

  • A. (3r-p) (2q + s)
  • B. 3(p + r)(2q-s)
  • C. 3(p – r)(2q-s)
  • D. (3r-p)(s-2q)

8. What number should be subtracted from the sum of 2 1/6 and 2 7/12 to give 3 ¼.

  • A. 1/3
  • B. 1 1/2
  • C. 1 1/6
  • D. 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?

  • A. 3 years
  • B. 10 years 
  • C. 5 years
  • D. 15 years

10.  If 16 x 2(x+1) = 4x x 8(1-x), find the value of x.

  • A. -4
  • B. 4
  • C.
  • D. -1

11. The circumference of a circular track is 9 km. 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?

  • A. 5km
  • B. 6km
  • C. 7km
  • D. 3km

12. Simplify 2\(\sqrt{7}\) – \(\frac{14}{\sqrt{7}}\) + \(\frac{7}{\sqrt{21}}\)

  • A. \(\frac{\sqrt{21}}{21}\)
  • B. 7\(\frac{\sqrt{21}}{3}\)
  • C. \(\frac{\sqrt{21}}{3}\)
  • D.2\(\sqrt{3}\)

13. If 4x +2y =16 and 6x – 2y = 4, find the value of (y-x)

  • A. 8
  • B. 2
  • C. 4
  • D. 6

14. Given that R is directly proportional to L and inversely proportional to P, R=3 when L =9 and P=0.8, find R when L=15 and P =1.8

  • A. 2.2
  • B. 3.3
  • C. 6.6
  • D. 0.3
15.  In the diagram, angle ABC and angle BCD are right angles, angle BAD = t and and angle EDF = 70o, find the value of t.
  • A. 70\(^o\)
  • B. 165\(^o\)
  • C. 140\(^o\)
  • D.110\(^o\)
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