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.

891.

The sum of the interior angles of a polygon is a given as 1080o. Find the number of the sides of the polygon.

A.

5

B.

7

C.

6

D.

8

Correct answer is D

\(\frac{(n - 2) 180}{180}\) = \(\frac{1080}{180}\)

(n - 2) = 6
n = 6 + 2 = 8

892.

From the diagram above, find the value of < OTQ

A.

230o

B.

55o

C.

115o

D.

65o

Correct answer is D

< OTQ = \(\frac{130}{2}\)
= 65o

893.

If the 2nd term of a G.P is \(\frac{8}{9}\) and the 6th term is 4\(\frac{1}{2}\). Find the common ratio.

A.

2

B.

\(\frac{3}{2}\)

C.

\(\frac{2}{3}\)

D.

3

Correct answer is B

T2 = \(\frac{8}{9}\), T6 = 4\(\frac{1}{2}\)
ar = \(\frac{8}{9}\)
ar5 = \(\frac{9}{2}\)

\(\frac{ar}{ar^5}\) = \(\frac{8}{9}\) x \(\frac{2}{9}\)

\(\frac{1}{r^4}\) = \(\frac{16}{81}\)

r = \(\sqrt[4]{18/16}\) = \(\frac{3}{2}\)

894.

In a school of 150 students, 80 offer French while 60 offer Arabic and 20 offer neither. How many students offer both subjects?

A.

45

B.

10

C.

35

D.

30

Correct answer is B

80 - x + x + 60 - x + 20 = 150 160 - x = 150 x = 160 - 150 = 10

895.

Find the derivative of y = ( \(\frac{1}{3}\)X + 6)\(^2\)

A.

2( \(\frac{1}{3}\)X + 6

B.

\(\frac{2}{3}\) ( \(\frac{1}{3}\)X + 6)

C.

\(\frac{2}{3}\) ( \(\frac{1}{3}\)X + 6)2

D.

\(\frac{1}{3}\) ( \(\frac{1}{3}\)X + 6)2

Correct answer is B

Y = ( \(\frac{1}{3}\)X + 6)\(^2\)

\(\frac{dy}{dx}\) = 2( \(\frac{1}{3}\)X + 6) \(\frac{1}{3}\)

= \(\frac{2}{3}\) ( \(\frac{1}{3}\)X + 6)