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 \(\frac{21}{9}\) to 3 significant figures
2.30
2.31
2.32
2.33
Correct answer is D
\(\frac{21}{9} = \frac{7}{3}\)
= 2.33 (to 3 sig. figs)
Simply \(\frac{2\frac{2}{3} \times 1\frac{1}{2}}{4\frac{4}{5}}\)
\(1\frac{1}{4}\)
\(1\frac{1}{6}\)
\(\frac{5}{6}\)
\(\frac{4}{5}\)
Correct answer is C
\(\frac{2\frac{2}{3} \times 1\frac{1}{2}}{4\frac{4}{5}}\)
\(\frac{8}{3} \times \frac{3}{2} \div \frac{24}{5}\)
\(\frac{8}{3} \times \frac{3}{2} \times \frac{5}{24}\)
\(\frac{5}{6}\)
Convert 112\(_6\) to a number in base three
2211
2121
1212
1122
Correct answer is D
First, convert to base 10
112\(_6\) = (1 x 6\(^2\)) + (1 x 6\(^1\)) + (2 x 6\(^0\))
= 36 + 6 + 2
= 44\(_{10}\)
\(\begin{array}{c|c} 3 & 44 \\ \hline 3 & 14 & r 2 \\ \hline 3 & 4 & r 2 \\ \hline 3 & 1 & r 1 \\ \hline 3 & 0 & r 1 \end{array}\)
Ans = 1122 = D
\(\frac{3}{8}\)
\(\frac{1}{3}\)
\(\frac{7}{24}\)
\(\frac{2}{3}\)
Correct answer is B
n(apples) = 9
n(bananas) = 8
n(oranges) = 7
n(\(\varepsilon\)) = 24
Hence Prob(not apple, nor orange) = Prob(banana) = \(\frac{8}{24}\) = \(\frac{1}{3}\)
\(\frac{1}{25}\)
\(\frac{1}{5}\)
\(\frac{4}{25}\)
\(\frac{3}{4}\)
Correct answer is C
\((1 \leq x \leq 25)\) = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
Number N of x divisible by both 2 and 3 is 4.
n(\(\varepsilon\)) = 25
= \(\frac{N}{n(\varepsilon)}\)
= \(\frac{4}{25}\)