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

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?

Find the hidden tiger in the given optical illusion ?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Buy me, smell me or deliver me, I do not change.

Who am I?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

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

Find the number of squares in the below-given picture.

Solve the following series:
AZ, GT, MN, __, YB