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

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

The Little ant seems to be always confused. Do you know why?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

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?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

A sundial has the fewest moving parts of any timepiece. Which has the most?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?