If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Replace the question mark with the number below given a simple math problem.

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

What can go up a chimney down, but can’t go down a chimney up?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

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

Before Mount Everest was discovered, what was the highest mountain in the world?

The cream is heavier than Milk. True or False?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211