Mathematics Questions and Answers

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.

HOT! Are you HIV Positive? Looking for love? Click here to join the HIV+ dating Network in Nigeria.

1,386.

Arrange the following numbers in descending orders of magnitude: 22_three, 34_five, 21_six

21_six, 22_three, 34_five,

21_six, 34_five, 22_three

22_three, 34_five, 21_six

34_five, 21_six, 22_three

View answer & explanation

Correct answer is D

22_three, 34_five, 21_six = (2 x 3)(2 x 3^o), (3 x 5¹) = (4 x 5⁰), (2 x 6¹) + (1 x 6⁰)

= (6 + 2), (15 + 4), (12 + 1) = 8_ten, 29_ten, 13_ten in descending order

29_ten, 13_ten, 8_ten = 34_five, 21_six, 22_three

1,387.

If log 2 = x, log 3 = y and log 7 = z, find, in terms of x, y and z, the value of log ($\frac{28}{3}$)

2x + y - z

2x + z - y

x + y - 2x

x + x - y

View answer & explanation

Correct answer is B

log ($\frac{28}{3}) = \log (\frac{7 \times 4}{3})$

= log 7 + log 4 - log 3

log 7 + log 22 - log 3 = log 7 + 2 - log 3

= z + 2x - y

= 2x + z - y

1,388.

In a particular year, the exchange rate of naira (N) varies directly with the Dollars{$}. If N1122 is equivalent to $8, find the Naira equivalent of $36

N8976

N5049

N140.25

N31.17

View answer & explanation

Correct answer is B

N1122 = $8; x = $36

x x $8 = N1122 x $36

$\frac{N1122 \times $36}{$8}$ = x

x = N5049

1,389.

Simplify: (3$\frac{1}{2} + 4\frac{1}{3}) \div (\frac{5}{6} - \frac{2}{3}$)

1$\frac{1}{4}$

8$\frac{1}{2}$

View answer & explanation

Correct answer is D

(3$\frac{1}{2} + 4\frac{1}{3}) \div (\frac{5}{6} - \frac{2}{3}$) = (7$\frac{3 + 2}{6}) \div \frac{(5 - 4)}{6}$

7$\frac{5}{6} \div \frac{1}{6} = \frac{47}{6} \times \frac{6}{1}$ = 47

1,390.

Every staff in an office owns either a Mercedes and/or a Toyota car. 20 own Mercedes, 15 own Toyota and 5 own both. How many staff are there in the office?