NECO Mathematics Past Questions & Answers - Page 20

96.

A sales boy gave a change of N75.00 to a buyer instead of N80.00, calculate his percentage error, correct to one decimal place?

A.

6.00%

B.

6.20%

C.

6.30%

D.

6.60%

E.

6.70%

Correct answer is C

No explanation has been provided for this answer.

97.

What must be added to b2-3ab to make it a perfect square?

A.

-3a

B.

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

C.

\(\frac{9}{4}\)

D.

\(\frac{9a}{4}\)

E.

\(\frac{9^2}{4}\)

Correct answer is E

No explanation has been provided for this answer.

98.

A car travels at an average speed of 75km/h. Find its speed in metres per second.

A.

270m/s

B.

208m/s

C.

27.0m/s

D.

20.8m/s

E.

2.08m/s

Correct answer is D

No explanation has been provided for this answer.

99.

Solve the equation: \(\frac{3}{[2(x - 2)]} - \frac{2}{[3(2 - x)]} = 0\)

A.

3

B.

2

C.

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

D.

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

E.

-3

Correct answer is B

No explanation has been provided for this answer.

100.

The first term of an A.P is equal to thrice the common difference, what is the sixth term of the A.P, if the common difference is 8?

A.

64

B.

48

C.

43

D.

24

E.

11

Correct answer is A

first term[a] = 3 * d → 3 * 8 = 24

sixth term of the A.P = a + 5d → 24 + [5 * 8]

⇒  24 + 40 = 64