How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What's the only room from which no one can enter or leave

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

The more of this there is, the less you see. What is it?

What jumps when it walks and sits when it stands?