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.
Evaluate \(\frac{8^{\frac{1}{3}} \times 5^{\frac{2}{3}}}{10^{\frac{2}{3}}}\)
\(\frac{2}{5}\)
\(\frac{5}{3}\)
3\(\sqrt{5}\)
3\(\sqrt{2}\)
Correct answer is D
\(\frac{8^{\frac{1}{3}} \times 5^{\frac{3}{2}}}{\frac{2}{10^3}}\) = \(\frac{(2^3)^{\frac{1}{3}} \times 5^{\frac{3}{2}}}{(2 \times 5)^{\frac{2}{3}}}\)
= \(\frac{2 \times 5}{2^{\frac{2}{3}} \times 5^{\frac{3}{2}}}\)
= 21 - \(\frac{2}{3}\)
= 2\(\frac{1}{3}\)
= 3\(\sqrt{2}\)
N560.00
N2,450.00
N2,800.00
N3,920.00
Correct answer is C
He pays tax on 1 - \(\frac{1}{8}\) = \(\frac{7}{8}\)th of his income
20% is 490, 100% is \(\frac{100}{20}\) x 490, N2,450.00
= \(\frac{7}{8}\) of his income = N2,450.00
\(\frac{1}{\frac{7}{8}}\) x 2450
= \(\frac{8 \times 2450}{7}\)
= \(\frac{19600}{7}\)
= N2800.00
1 : 1 : 1
4 : 2 : 1
5 : 1 : 1
4 : 1 : 1
Correct answer is D
Let x represent total number of balls in the basket.
If there are 10 blue balls, \(\frac{1}{8}\) of x = 10
x = 10 x 8 = 80 balls
Green balls will be \(\frac{5}{8}\) x 80 = 50 and black balls = \(\frac{2}{8}\) x 80 = 20
Ratio = Green : black : blue
50 : 20 : 10
-10 : -10 : -
------------------
New Ratio 40 : 10 : 10
4 : 1 : 1
N1,080.00
N2,400.00
N3,000.00
N3,600.00
Correct answer is B
Let value of store = X
Ratio of Taiwo's share to kehine's is 11:9 Keyinde sells \(\frac{2}{3}\) of her share to Taiwo for N720
\(\frac{2}{3}\) of 9 = 6
∴ Sum of the ratio = 11 + 9 = 20
\{\frac{6}{20}\) of x = N720
\(\frac{6x}{20}\) = 720
∴ x = \(\frac{720 \times 20}{6}\)
x = N24,000
A 5.0g of salt was weighted by Tunde as 5.1g. What is the percentage error?
20
2
1.1
0.2
Correct answer is B
% error = \(\frac{\text{actual error}}{\text{true value}}\) x 100
Where actual error = 5.1 - 5.0 = 0.1
true value = 5.0g
% error = \(\frac{0.1}{5.0}\) x 100
= \(\frac{10}{5}\)
= 2%