How can a man go eight days without sleep?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

When we see 2 but call 10?

The answer I give is yes, but what I mean is no. What was the question?

Find out the number of circles in the given picture having Illusion

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

The dirtier I get, the whiter I look. Who am I?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?