You need to move three matchsticks to form three squares. Can you do it?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What is the next shape from answers A, B, C, and D figure?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Who always enjoys poor health?