Out of four images which one is the odd one out?

What has 88 keys?

Can you find the key in the picture below?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Bay of Bengal is in which state?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

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

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?