2, 3, 5, 9, 17, _ What is the next number in the sequence?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Complete the table series riddle by finding the number that can replace "??".

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Two friends Smith and Andrew were talking about the bravery of their families. Smith told great stories about his courageous grandfather who fought for Britain in "World War I". Andrew told that his grandfather was so brave that in 1919 just after the war he was honoured with a bravery medal with the words "For our Courageous Soldiers In World War I" embedded into it. Smith knows that his friend is lying. How?

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?

It belongs to you, but other people use it more than you do. What is it?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.