Binary Operations - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 2019

A binary operation \(\otimes\) is defined by \(m \otimes n = mn + m - n\) on the set of real numbers, for all m, n \(\in\) R. Find the value of 3 \(\otimes\) (2 \(\otimes\) 4).

A. 6
B. 25
C. 15
D. 18

Question 2:

• 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 3:

• JAMB 2017

The operation * on the set R of real number is defined by x * y = 3x + 2y − 1, find 3* − 1

A. 9
B. - 9
C. 6
D. - 6

Question 4:

• JAMB 2017

If m * n = [mn − nm] for m, n belong to R, evaluate − 3 * 4

A. 3
B. 4
C. 5
D. 6

Question 5:

• JAMB 2019

A binary operation \(\otimes\) is defined by \(m \otimes n = mn + m - n\) on the set of real numbers, for all m, n \(\in\) R. Find the value of 3 \(\otimes\) (2 \(\otimes\) 4).

A. 6
B. 25
C. 15
D. 18