Count the squares in the matchstick puzzle below?

81 x 9 = 801. What must you do to make the this equation true?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C