What month of the year has 28 days?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

If six children and two dogs were under an umbrella, how come none of them got wet?

What jumps when it walks and sits when it stands?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

How many times can you subtract the number two from the number fifty?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?