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

What does does this rebus picture means ?

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.

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).

Buy me, smell me or deliver me, I do not change.

Who am I?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

How many words can a pen with half refill write?

When is the top of a mountain similar to a savings account?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Make a sentence consisting of three words that have the whole alphabet.