ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 11:

• JAMB 2019

The nth term of a sequence is given by 2\(^{2n - 1}\). Find the sum of the first four terms.

A. 74
B. 32
C. 42
D. 170

Question 12:

• JAMB 2019

If P varies inversely as the square root of q, where p = 3 and q = 16, find the value of q when p = 4.

A. 12
B. 8
C. 9
D. 16

Question 13:

• JAMB 2019

Find the value of x and y in the simultaneous equation: 3x + y = 21; xy = 30

A. X = 3 or 7, y = 12 or 8
B. X = 6 or 1, y = 11 or 5
C. X = 2 or 5, y = 15 or 6
D. X = 1 or 5, y = 10 or 7

Question 14:

• JAMB 2019

A binary operation Δ is defined by a Δ b = a + 3b + 2.
Find (3 Δ 2) Δ 5

A. 35
B. 59
C. 28
D. 87

Question 15:

• JAMB 2019

If M varies directly as N and inversely as the root of P. Given that M = 3, N = 5 and P = 25. Find the value of P when M = 2 and N = 6.

A. 36
B. 63
C. 47
D. 81