GMAT (Graduate Management Admission Test) Question:

If 3/p = 6 and 3/q = 15 then p - q = ?

1. 1/3
2. 2/5
3. 3/10
4. 5/6
5. None of the above

Ans : 3

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Tom, Dick and Harry went for lunch to a restaurant. Tom had $100 with him, Dick had $60 and Harry had $409. They got a bill for $104 and decided to give a tip of $16. They further decided to share the total expenses in the ratio of the amounts of money each carried. The amount of money which Tom paid more than what Harry paid is	A father is three times as old as his son. After fifteen years the father will be twice as old as his sons age at that time. Hence the fathers present age is