Jamb Mathematics Past Questions and Answers

Question 2381:

• JAMB 2021

If (x + 2) and (x - 1) are factors of the expression \(Lx + 2kx^{2} + 24\), 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

Question 2382:

• JAMB 2021

factorize m\(^3\) - m\(^2\) + 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)

Question 2383:

• JAMB 2021

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

Question 2384:

• JAMB 2021

What is the n-th term of the sequence 2, 6, 12, 20...?

A. 4n - 2
B. 2(3^{n - 1})
C. N² + n
D. N² + 3n + 2

Question 2385:

• JAMB 2021

If the binary \(\ast\) is defined by m \(\ast\) 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