MBA Exam

Sam took a total of 4 hours to cover a round trip on a river. If he doubles his rowing speed, he would take 2.4 hours less to cover the round trip. What is the ratio of the speed of the stream to the intial rowing speed of Sam in still water?

1) 1:01
2) 1:02
3) 2:03
4) 3:04

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MBA Other Question

How many 3-digit natural numbers have their cubes ending with 24 ?

1) 6
2) 9
3) 18
4) 21
What is the largest possible number of elements in a subset S' of S = {1, 2, 3, ... , 9} such that the sum of every pair of distinct elements in S' is different?

1) 4
2) 5
3) 6
4) None of these