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

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Prove that twice of ten is the same as twice of eleven.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

If eleven plus two equals one, what does nine plus five equal?

Can you spot the man between the coffee bean in the picture below ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

What runs around the whole yard without moving?