I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Which is faster, Heat or Cold ? Explain.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

Look at the picture and find out which square is not linked with any of the other squares.

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

How can you write nineteen in a manner that if we take out one, it becomes twenty?