Aptitude Questions and Answers for PLACEMENTS

Ques. In a town the population grows at a simple rate of 10% in a decade and compounds from decade to decade. Find the population at the beginning of the 1970s if the population at the beginning of the 1990s is 3,63,000 people.
Op 1: 30,000
Op 2: 3,00,000
Op 3: 30,00,000
Op 4: 3,15,000
Op 5:
Correct Op:2


Ques. In approximately how many years will a certain sum of money triple itself at 22% simple interest?
Op 1: 10 years
Op 2: 11 years
Op 3: 9 years
Op 4: 12 years
Op 5:
Correct Op : 3

Ques. A boat covers 40 km upstream and 90 km downstream in 5 hr. It can also cover 60 km upstream and 60 km downstream in 5 hr. The speed of the water current is
Op 1: 4 km/hr
Op 2: 5 km/hr
Op 3: 20 km/hr
Op 4: 25 km/hr
Op 5:
Correct Op : 2