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.
Find the reciprocal of \(\frac{\frac{2}{3}}{\frac{1}{2} + \frac{1}{3}}\)
\(\frac{4}{5}\)
\(\frac{5}{4}\)
\(\frac{2}{5}\)
\(\frac{6}{7}\)
Correct answer is B
\(\frac{2}{3}\) = \(\frac{2}{3}\)
= \(\frac{2}{3}\) x \(\frac{6}{5}\)
= \(\frac{4}{5}\)
reciprocal of \(\frac{4}{5}\) = \(\frac{1}{\frac{4}{5}}\)
= \(\frac{5}{4}\)
Find the smallest number by which 252 can be multiplied to obtain a perfect square
2
3
5
7
Correct answer is D
\(252 = 2^{2} \times 3^{2} \times 7\)
\(\therefore\) To make 252 a perfect square, the smalest number to multiply with = 7.
\(252 \times 7 = 1764 = 42^{2}\)
Divide the L.C.M of 48, 64, and 80 by their H.C.F
20
30
48
60
Correct answer is D
48 = 24 x 3, 64 = 26, 80 = 24 x 5
L.C.M = 26 x 3 x 5
H.C.F = 24
\(\frac{2^6 \times 3 \times 5}{2^4}\)
= 22 x 3 x 5
= 4 x 3 x 5
= 12 x 5
= 60
282
240
222
210
Correct answer is C
Let x represent Musa's total mark when he scores 57 in biology and Let Y represent Musa's total mark when he now scored 75 in biology, if he scored 75 in biology his new total mark will be \(\frac{Y}{4}\) = 60, y = 4 x 60 = 240
To get his total mark when he scored 57, subtract 57 from 75 to give 18, then subtract this 18 from the new total mark(ie. 240)
= 240 - 18
= 222
Evaluate (212)3 - (121)3 + (222)3
(313)3
(1000)3
(1020)3
(1222)3
Correct answer is C
Evaluate (212)3 - (121)3 + (222)3
(221)3+
(222)3
1211
121
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(1020)3