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.

1,551.

A baker used 40% of a 50kg bag of flour. If \(\frac{1}{8}\) of the amount used was for the cake, how many kilogram of flour was used for the cake?

A.

2\(\frac{1}{2}\)

B.

6\(\frac{1}{2}\)

C.

15\(\frac{3}{8}\)

D.

17\(\frac{1}{2}\)

Correct answer is A

\(\frac{40}{100} \times 50\)kg = 20kg

\(\frac{1}{8}\) of 20kg for cake; \(\frac{1}{8}\) x \(\frac{20}{1}\)

= 2\(\frac{1}{2}\)kg

1,552.

If 30% of y is equal to x, what in terms of x, is 30% of 3y?

A.

\(\frac{x}{9}\)

B.

\(\frac{x}{3}\)

C.

x

D.

3x

Correct answer is D

If 30% of y = x, then 30% of 3y = 3x

1,553.

A fair coin is tossed three times. Find the probability of getting two heads and one tail.

A.

\(\frac{1}{2}\)

B.

\(\frac{3}{8}\)

C.

\(\frac{1}{4}\)

D.

\(\frac{1}{8}\)

Correct answer is B

Pr(head) = \(\frac{1}{2}\), Pr(tail) = \(\frac{1}{2}\):Pr(2 heads)

= \(\frac{1}{2}\) x \(\frac{1}{2}\) = \(\frac{1}{4}\)

Pr(2 heads and tail) 3 times

= (\(\frac{1}{4}\) x \(\frac{1}{2}\)) x 3

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

1,554.

P is a point on the same plane with a fixed point A. If P moves such that it is always equidistant from A, the locus of P is

A.

a straight line joining A and P

B.

the perpendicular bisector of AP

C.

a circle with centre A

D.

the triangle with centre P

Correct answer is C

No explanation has been provided for this answer.

1,555.

Given that y = 1 - \(\frac{2x}{4x - 3}\), find the value of x for which y is undefined

A.

3

B.

\(\frac{3}{4}\)

C.

\(\frac{-3}{4}\)

D.

-3

Correct answer is B

for undefined expression, the denomination is zero 4x - 3 = 0

4x = 3; x = \(\frac{3}{4}\)