Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

If two's company, and three's a crowd, then whats four and five ?

Can you find out the missing number in the grid?

I’m tall when I’m young, and I’m short when I’m old. What am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Forwards I am heavy, backward I am not. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?