NECO Mathematics Past Questions & Answers - Page 5

21.

Find the coefficient of xy in the expansion of (x - 4y)(3x + 2y)

A.

14

B.

12

C.

10

D.

-10

E.

-12

Correct answer is D

No explanation has been provided for this answer.

22.

A pair of shoes was sold for N2,250.00 at a loss of 10%. What was the cost price?

A.

N750.00

B.

N2,500.00

C.

N2,538.00

D.

N3,288.00

E.

N4,038.00

Correct answer is B

No explanation has been provided for this answer.

23.

If the 3rd and the 5th terms of an A.P are 6 and 10 respectively, find the 1st term and the common difference respectively.

A.

1, 2

B.

2, 2

C.

2, 3

D.

3, 2

E.

3,3

Correct answer is B

No explanation has been provided for this answer.

24.

The ages of 10 students in a class are; 15, 16, 15.5, 17, 14.9, 14.5, 14.1, 15.1, 14.8. find the range of their ages.

A.

6.1

B.

4.8

C.

2.9

D.

2.1

E.

1.9

Correct answer is C

No explanation has been provided for this answer.

25.

2 bags of sugar at Nx per bag are mixed with 3 bags of sugar at Ny per bag. What is the cost in N of the mixture per bag?

A.

\(\frac{(2x + 3y)}{5}\)

B.

\(\frac{(x + y)}{2}\)

C.

\(\frac{x}{2} +\frac{y}{3}\)

D.

\(\frac{(x + y)}{5}\)

E.

\(\frac{(3x + 2y)}{5}\)

Correct answer is A

No explanation has been provided for this answer.