Mathematics questions and answers

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.

3,196.

Find the 9th term of the arithmetic progression 18, 12, 6, 0, -6 .........

A.

-54

B.

-30

C.

30

D.

42

E.

66

Correct answer is B

18, 12, 6, 0, -6, 12, -18, 24, -30
9th term = -30

3,197.

A boy measured the length and breath of a rectangular lawn as 59.6m and 40.3m respectively instead of 60m and 40m. What is the percentage error in his calculation of the perimeter of the lawn?

A.

10%

B.

1.4%

C.

7%

D.

0.2%

E.

0.1%

Correct answer is E

Length = 59.6m Breath = 40.3m Perimeter = (59.6m + 40.3m) x 2 = 99.9 x 2 = 199.8m Actual measurement Perimeter = (60 + 40) x 2 = 100 x 2 = 200m Error = 200m - 199.8m = 0.2 Error =0.2/200 x 100/1 = 0.1%

3,198.

Simplufy Log104 + Log1025

A.

1

B.

2

C.

3

D.

4

E.

5

Correct answer is B

Log104 + Log1025 = Log10(4 + 25)
= Log10100 = Log10102
= 2Log1010 = 2 x 1 = 2

3,199.

Simplify 56x\(^{-4}\) \(\div\) 14x\(^{-8}\)

A.

2x-12

B.

3x-3

C.

4x-4

D.

4x-3

E.

4x4

Correct answer is E

\(56x^{-4} \div 14x^{-8}\)

= \(4x^{- 4 - (-8)}\)

= \(4x^{4}\)

3,200.

Simplify: \((2\frac{1}{6} - 1\frac{2}{3}) \div 2\frac{2}{3}\).

A.

3/16

B.

7/16

C.

1 13/24

D.

2 11/24

E.

10 2/5

Correct answer is A

\((2\frac{1}{6} - 1\frac{2}{3}) \div 2\frac{2}{3}\)

= \((\frac{13}{6} - \frac{5}{3}) \div \frac{8}{3}\)

= \(\frac{3}{6} \times \frac{3}{8}\)

= \(\frac{3}{16}\)