Mathematics 2021 Past Questions | WAEC
Study the following Mathematics past questions and answers for JAMB, WAEC NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.
- 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. 1
- 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 angle EDF = 70o, find the value of t.
- A. 70\(^o\)
- B. 165\(^o\)
- C. 140\(^o\)
- D.110\(^o\)
