Question Of The Day

There were x pigeons and y mynahs in a cage. One fine morning p of them escaped to freedom. If he bird keeper, knowing only that p = 7, was able to figure out without looking into the cage that at least one pigeon had escaped, then which of the following does not represent a possible (x, y) pair?

a) (10, 8)

b) (7, 2)

c) (25, 6)

d) (12, 4)

Ans: a) (10, 8)

If the number of maynahs is less than 7, and if 7 birds escaped, at least one pigeon has to escape.