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JAMB Mathematics Past Questions & Answers - Page 154

766.

For the set of numbers 2, 3, 5, 6, 7, 7, 8

A.

The median is greater than the mode

B.

The mean is greater than the mode

C.

The mean is greater than the median

D.

The median is equal to the mean

E.

The mean is less than the median

Correct answer is E

Mean = 5, 42

Median = 6

Mode = 7

The mean is less than the median

767.

12 men complete a job in 9 days. How many men working t the same rate would be required to complete the job in 6 days?

A.

24

B.

18

C.

12

D.

9

E.

8

Correct answer is B

12 men in 9 days,

1 day in 12×9 men

In 6 days we have 12×96 men

= 1086

= 18 men

768.

Find the value of log10140, given that log104 = 0.6021

A.

1.3979

B.

2.3979

C.

-1.6021

D.

2.6021

Correct answer is C

log10140 = log101 - (log104 + log1010)

= 0 - 1.6021

= -1.6021

769.

Find the value of (412)6

A.

1

B.

2

C.

4

D.

6

E.

64

Correct answer is E

The powers will multiply when the bracket is expanded

The multiplied powers: 12 * 6 → 3

: 43 = 4 * 4* 4

→ 64

770.

If x3 - 12x - 16 = 0 has x = -2 as a solution then the equaion has

A.

x = -4 as a solution also

B.

3 roots all different

C.

3 roots with two equal and the third different

D.

3 roots all equal

E.

only one root

Correct answer is B

No explanation has been provided for this answer.