Before Mount Everest was discovered, what was the highest mountain in the world?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Find the missing letter in the last circle logically in the given below picture.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

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 has hands, but can’t clap?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?