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.

1,481.

Evaluate(111two)2 and leave your answer in base 2.

A.

111001two

B.

110001two

C.

101001two

D.

10010two

Correct answer is B

No explanation has been provided for this answer.

1,482.

In the diagram |XY| = 12cm, |XZ| = 9cm, |ZN| = 3cm and ZY||NM, calculate |MY|

A.

3cm

B.

4cm

C.

5cm

D.

6cm

Correct answer is B

\(\frac{|YM|}{|YX|} = \frac{|ZM|}{|ZX|}\)

\(\frac{|YM|}{12} = \frac{3}{9}\)

|YM| = 3 x \(\frac{12}{9}\)

|MY| = 4cm

1,483.

In the diagram what is x + y in terms of z?

A.

180o - z

B.

180o + z

C.

z - 180o

D.

z

Correct answer is A

x + y + z = 180(sum of angles in a \(\bigtriangleup\))

x + y = 180 - z

1,484.

The diagram shows an arc MN of a circle, centre O, with 10cm. If < MON = 72o. calculate the length of the arc, correct to three significant figures. [Take \(\pi = \frac{22}{7}\)]

A.

6.28cm

B.

12.6cm

C.

22.6cm

D.

62.8cm

Correct answer is B

Length of arc = \(\frac{\theta}{360 \times 2 \pi r}\)

= \(\frac{72}{360} \times 2 \times \frac{22}{7} \times 10\)cm

= 12.57

= 12.6cm(3 s.f)

1,485.

If the pass mark was 4. What percentage of the pupils failed the test?

A.

20.0%

B.

37%

C.

62.5%

D.

80.0%

Correct answer is A

No. of pupils that failed = 1 + 3 + 4 + 8

% failed = \(\frac{8}{40} \times 100\)% = 20.0%