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

How Come ??

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What demands an answer, but asks no questions

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

How many times in a given day, minutes and hour clock comes in a straight line ?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

What is the word or phrase?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Why is a river so rich ?