Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Why Wine Glass Stem is so long?

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

Count the number of squares in the picture below.

They are three errirs in this question. Can you find them?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Find the hidden tiger in the given optical illusion ?

why number 8549176320 is one of a kind?