What has to be broken before you can use it?

Find out the missing number in the picture attached:

Find the number of squares in the below picture

I can write cow in 13 letters.

Can You?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

What has no start, end, or centre?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?