You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Do You See It?

What is the fastest way to double your money?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

What do you think with the below Picture ?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you find out the missing number in the grid?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)