The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Who always enjoys poor health?

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

Identify the hidden meaning behind this picture?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

There is a place where if I stand up straight, I will still be considered sideways.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

2, 3, 5, 9, 17, _ What is the next number in the sequence?