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?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

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

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

What is next number in the pattern below:

131 517 192 123 ?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Prove that the below maths equation is true.

8 + 8 = 91

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?