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

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

Find the number of squares in the below-given picture.

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?