NECO Mathematics Past Questions & Answers - Page 14

66.

What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

A.

– 2.0

B.

– 184

C.

-1.84

D.

2

E.

18.4

Correct answer is D

No explanation has been provided for this answer.

67.

If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

A.

(-1,2,...5)

B.

(-1,1,....5)

C.

(1,2,..5)

D.

(2,3,...10)

E.

(1,2,...10)

Correct answer is C

No explanation has been provided for this answer.

68.

A car dealer sells a car and makes a profit of 15%. If the car costs N320,000.00, how much did he sell the car?

A.

N272,000.00

B.

N296,000.00

C.

N300,000.00

D.

N368,000.00

E.

N400,000.00

Correct answer is D

No explanation has been provided for this answer.

69.

A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours?

A.

1

B.

\(\frac{13}{26}\)

C.

\(\frac{5}{18}\)

D.

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

E.

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

Correct answer is D

No explanation has been provided for this answer.

70.

Evaluate log 18 + log6 - log16\(^{\frac{1}{2}}\)

A.

log 3

B.

log 9

C.

log 20

D.

3 log 2

E.

3 log 3

Correct answer is E

No explanation has been provided for this answer.