What is black when you buy it, red when you use it, and gray when you throw it away?

Can you count the number of triangles in the picture below?

why number 8549176320 is one of a kind?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Two natural numbers have a sum of less than 100 and are greater than one.

John knows the product of the numbers and Jacob knows the sum of numbers.

The following conversation takes place between them:
John: 'I am not aware of those numbers.'
Jacob: 'I knew you wouldn't be. I am not aware myself.'
John: 'Now I know them!'
Jacob: 'Now I know them, too!'

What are the two numbers?