How is the moon similar to a dollar?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?