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?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Can you make four (4) nines (9) equal 100?

why number 8549176320 is one of a kind?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What happened when the wheel was invented?

Can you tell a 3D object that has just two surfaces?