It is ____ to read this year’s textbook _____ the last year’s.

Each of P, Q, R, S, W, X, Y and Z has been married at most once. X and Y married and have two children P and Q, Z is grandfather of the daughter ‘S’ of P. Further Z and W married and are parents of R. Which one of the following must necessarily be FALSE?

The number of 3 digit numbers such that the digit 1 is never to the immediate right of 2 is

1200 men and 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to build the same bridge. How many men will be needed to build the bridge in one week?