Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

Decode below rebus
D
N
A
T
S , D

Solve this riddle by finding the odd one out from the rest.

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Which flower has two lips?