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?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

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

What is the Surname of Barbie Doll?

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

In the image given, you can find several triangles. Can you count them all?

Can you find the thief by just looking at the picture below?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"