If 21x = 79x, what is the value of x?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

If six children and two dogs were under an umbrella, how come none of them got wet?

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

Which tank will fill first?

Decode this picture on T-Shirt and tell what it says ?

Can you replace the question mark with the correct number?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

what does the below rebus means?