How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.
If 8x-1 = \(\frac{1}{4}\), find x
-\(\frac{-5}{3}\)
-1
-\(\frac{1}{3}\)
\(\frac{1}{3}\)
Correct answer is D
8x-1 = \(\frac{1}{4}\)
23(x - 1 = 2-2
3x - 3 = -2
3x = -2 + 3
3x = 1
x = \(\frac{1}{3}\)
Solve the simultaneous equations x + y = 2 and 3x - 2y = 1
x = 2 and y = 1
x = 1 and y = 1
x = 1 and y = 2
x = -1 and y = 1
Correct answer is B
x + y = 2........... (i)
3x - 2y = 1......(ii)
From (i): x = 2 - y ..........(iii)
subt. (2 - y) for x in (ii)
3(2 - y) 2y = 1
6 - 3y - 2y = 1
-5y = 1 - 6 = -5
y = \(\frac{-5}{-5}\) = 1
subst. (i) for y in (iii)
x = 2 - 1 = 1
x = 1, y = 1
If x = 3, Y = 2 and z = 4, what is the value of 3x2 - 2y + z?
17
27
35
71
Correct answer is B
x = 3, y = 2, z = 4
3x2 - 2y + z
= 3(3)2 - 2(2) + 4
3(9) - 4 + 4 = 27
For what value of x is the expression \(\frac{2x - 1}{x + 3}\) not defined?
3
2
\(\frac{1}{2}\)
-3
Correct answer is D
\(\frac{2x - 1}{x + 3}\) not defined
x + 3 = 0
x = -3
I am x years old and my brother is 3 years older. How old was my brother last year?
(x - 4)years
(x + 2) years
(3x - 10years
(3x + 1)years
Correct answer is B
I am x years old; My brother = 3 + x; My brother
last year = (3 + x) - 1 = x + 3 - 1
= (x + 2) years