Can you find the key in the picture below?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What 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?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Find out the missing number in the picture attached:

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Who is that with a neck and no head, two arms and no hands? What is it?

Using eight eights and addition only, can you make 1000?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?