The banker's discount on a sum of money for 1(1/2) years is Rs. 120. The true discount on the same sum for 2 years is Rs.150. What is the rate per cent?

Correct Answer : A

01-Jan-2007 was Monday. What day of the week lies on 01-Jan-2008?

2 + 22 + 222 + 2.22 = ?

Which one of the following cannot be the square of natural number ?