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?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

How can you make number one disappear by adding something to it?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Can you make four (4) nines (9) equal 100?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What number do you get when you multiply all of the numbers on a telephone's number pad?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?