5. If A’s salary is 20% less than B’s salary, by how much percent B’s salary more than A’s?
A. 24%
B. 25%
C. 20%
D. 22%
ANS: B
EXPLANATION:
[20/(100-20)] × 100 =[ 20/80]×100=25%
6. The volume of a cube is 125 cm3. The surface area of the cube is
A. 625 cm2
B. 125 cm2
C. 150 cm2
D. 100 cm2
ANS: C
EXPLANATION:
a3=125
a=5
Surface area = 6a2=6×25=150cm2
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