1. 

What decimal of an hour is a second ?

A. .0025
B. .0256
C. .00027
D. .000126

2. 

Evaluate : (2.39)2 - (1.61)2
2.39 - 1.61

A. 2
B. 4
C. 6
D. 8

3. 

The value of (0.96)3 - (0.1)3 is:
(0.96)2 + 0.096 + (0.1)2

A. 0.86
B. 0.95
C. 0.97
D. 1.06

4. 

The value of 0.1 x 0.1 x 0.1 + 0.02 x 0.02 x 0.02 is:
0.2 x 0.2 x 0.2 + 0.04 x 0.04 x 0.04

A. 0.0125
B. 0.125
C. 0.25
D. 0.5

5. 

If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?

A. 0.172
B. 1.72
C. 17.2
D. 172