Eight of us go fourth, not back, to protect our king from an attack. What are we?
How can you take 2 from 5 and leave 4?
We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?
What has to be broken before you can use it?
Can you count the number of squares in the given picture?
Find out the missing number in the picture attached:
Which number should replace the question mark?
You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up. In how many different ways you can climb 10 stairs?
What has many teeth, but cannot bite?
Replace the question mark with the correct number. 2 + 2= 4 3 + 3= 18 4 + 4= 48 5 + 5= ?
Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki