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

You walk into a creepy house by yourself. There is no electricity, plumbing, or ventilation. Inside you notice 3 doors with numbers on them. Once you open the doors you will die a particular way. Door No.1 You’ll be eaten by a lion who is hungry. Door No.2 You’ll be stabbed to death. Door No.3 There is an electric chair waiting for you. Which door do you pick?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

I have teeth but i don't bite. Who Am I ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Which part of London exists in France as well ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What is the next number in this series?

4,12,84,3612....

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

How many triangles are there in the picture below?