You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Can you start the fire using two pieces of wood?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

If two's company, and three's a crowd, then whats four and five ?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Can you move 2 matchsticks to form four equal sized squares.

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

What does this rebus means ?