Which one of the given numbers is completely divisible by 45?

None of these

165642

202860

112330

Correct Answer : C

A box contains 4 red, 3 white and 2 blue balls. Three balls are drawn at random. Find out the number of ways of selecting the balls of different colours?

The 288^{th} term of the series a, b, b, c, c, c, d, d, d, d, e, e, e, e, e, f, f, f, f, f, f…. is

1^{2} + 2^{2} + 3^{2} + ... + 8^{2} = ?