Count the number of balls in picture below:

Move four matchsticks to the below square to form three squares?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

What breaks yet never falls, and what falls yet never breaks?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

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

which number am I?

The more you take me, the more you leave me behind.
Who Am I?

If eleven plus two equals one, what does nine plus five equal?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?