Mathematics 2021 Past Questions | JAMB
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.
31. factorize m3– m2+ 2m – 2
- A. (m2 + 1)(m – 2)
- B. (m – 1)(m + 1)(m + 2)
- C. (m – 2)(m + 1)(m – 1)
- D. (m2 + 2)(m – 1)
32. The angles of a quadrilateral are 5x-30, 4x+60, 60-x and 3x+61.find the smallest of these angles
- A. 5x – 30
- B. 4x + 60
- C. 60 – x
- D. 3x + 61
33. What is the n-th term of the sequence 2, 6, 12, 20…?
- A. 4n – 2
- B. 2(3n – 1)
- C. n2 + n
- D. n2 + 3n + 2
34. If the binary operation ∗is defined by m ∗n = mn + m + n for any real number m and n, find the identity of the elements under this operation
- A. e = 1
- B. e = -1
- C. e = -2
- D. e = 0
35. Factorize completely 81a4– 16b4
- A. (3a + 2b)(2a – 3b)(9a2 + 4b2)
- B. (3a – 2b)(2a – 3b)(4a2 – 9b2)
- C. (3a – 2b)(3a + 2b)(9a2 + 4b2)
- D. (6a – 2b)(8a – 3b)(4a3 – 9b2)
36. Find x if log9x = 1.5
- A. 27
- B. 15
- C. 3.5
- D. 32
37. List all integers satisfying the inequality in -2 < 2x-6 < 4
- A. 2,3,4 and 5
- B. 2,3
- C. 2,5
- D. 3,4
38. X is due east point of y on a coast. Z is another point on the coast but 6.0km due south of Y. If the distance ZX is 12km, calculate the bearing of Z from X
- A. 240°
- B. 150°
- C. 60°
- D. 270°
39. A group of market women sell at least one of yam, plantain and maize. 12 of them sell maize, 10 sell yam and 14 sell plantain. 5 sell plantain and maize, 4 sell yam and maize, 2 sell yam and plantain only while 3 sell all the three items. How many women are in the group?
- A. 25
- B. 19
- C. 18
- D. 17
40. If (x + 2) and (x – 1) are factors of the expression Lx+2kx2, find the values of L and k.
- A. l = -12, k = -6
- B. l = -2 , k = 1
- C. l = -2 , k = -1
- D. l = 0, k = 1
