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.

1,051.

Express 0.03785 in standard form correct to 3 significant figures.

A.

3 × 10\(^{-2}\)

B.

3.78 × 10\(^{-2}\)

C.

3.79 × 10\(^{-2}\)

D.

3.79 × 10\(^{-1}\)

E.

3.78 × 10\(^{-2}\)

Correct answer is C

No explanation has been provided for this answer.

1,052.

The first term of a G.P is 7. Find its 4th term, if its common ratio is 3.

A.

567

B.

280

C.

189

D.

63

E.

21

Correct answer is C

No explanation has been provided for this answer.

1,053.

A trader sold an article for N4,600.00 thereby making a profit of 15%. Calculate the cost price of the article

A.

N3450.00

B.

N3910.00

C.

N4000.00

D.

N5290.00

E.

N6900.00

Correct answer is C

No explanation has been provided for this answer.

1,054.

The radius of a sphere is 21cm. If s and v represent the curved surface area and volume respectively, what is s : v? (take π = 3.142)

A.

1:03

B.

1:07

C.

3:01

D.

3:07

E.

7:01

Correct answer is B

C.S.A = 5,544 Volume = 38,808 S : V = 1 : 07

1,055.

51 women wore coloured shoes to a party, out of which 21 wore purple and 9 wore white. if a woman is selected at Random. What is the probability that she is wearing neither a purple shoe nor a white shoe?

A.

\(\frac{10}{17}\)

B.

\(\frac{7}{17}\)

C.

\(\frac{20}{51}\)

D.

\(\frac{3}{17}\)

E.

\(\frac{1}{51}\)

Correct answer is B

No of women wearing both purple and white shoes = 21 + 9

= 30 women.

No of women wearing neither purple nor white shoes = 51 - 30

= 21 women

\(\therefore\) Probability of picking a woman wearing neither purple nor white shoes 

= \(\frac{21}{51}\)

= \(\frac{7}{17}\).