What is the smallest perfect square that is divisible by each of 42, 48 and 60?

The correct answer is A

A certain sum of money will be doubled in 2 years at the rate of simple interest percent per annum is:

What sum of money must be given at simple interest for 9 months at 5% per annum in order to earn Rs. 360 interest?

At what % of simple interest per annum will Rs. 400 amount to Rs. 620 in five years?

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