How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?
In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?
On a magical land of Mexico , all the animal in the land are rational.
There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).
If we leave them for some time then how many goat and tiger will be there , when we come back ?
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
