Mathematics Practice Test – Binary Operations (Questions with Answers and Explanations)

Hello and Welcome to Mathematics Practice Test - Binary Operations

1. You are to attempt 5 random objectives questions ONLY.
2. Supply Your Full Name and Location in the text box below and begin immediately.
3. You can attempt as many times as possible
1.

A binary operation * is defined on the set of integers such that p * q = pq + p – q. Find 2 * (3 * 4). (JAMB 2012)

A. 11
B. 13
C. 15
D. 22

2.

Two binary operations * and ⊕ are defined as m * n = mn – n – 1 and m ⊕ n = mn + n - 2 for all real numbers m, n. Find the value of 3 ⊕ (4 * 5). (JAMB 1997)

A. 60
B. 57
C. 54
D. 42

3.

The operation * on the set R of real numbers is defined by x * y = 3x + 2y – 1. Find (3 * -1). (JAMB 2018)

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

4.

A binary operation * on the set of rational numbers is defined as x * y = $\dpi{110}\frac{x^{2}&space;-&space;y^{2}}{2xy}$. Find -5*3. (JAMB 2006)

A. $\dpi{110}\frac{17}{15}$      B. - $\dpi{110}\frac{17}{15}$      C. $\dpi{110}\frac{8}{15}$      D. - $\dpi{110}\frac{8}{15}$

5.

A binary operation * is defined by x * y = xy. If x * 2 = 12 – x, find the possible values of x. (JAMB 2014)

A. 3, 4
B. 3, -4
C. -3, 4
D. -3, -4

error: Content is protected !!