The greatest number by which the product of three consecutive multiples of 3 is always divisible is:
54
81
162
243

The sum of present ages of son and father is 60 years. six years ago, father's age was five times the age of the son. After 6 years , son's age wiill be
12
15
16
20

By selling 12 toffess for a rupee , a man loses 20%.How many for rupee should she sell to get a gain of 20%?
5
8
10
15

A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days , A can alone can finish the remaining work?
5
7
6
8

Two trains running in opposite directions each 100m long cross each other in 8 seconds,If one is moving twice as fast the other , then the speed of the the faster train is
30Km/hr
45Km/hr
60Km/hr
75Km/hr