A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

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

which number am I?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Find the missing number in the image below.

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

I have feet, but no legs. Which animal Am I?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?