What is the fastest way to double your money?

Can you identify if it's a murder or a suicide ?

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?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

How many letters are in the alphabet?

I don't get anymore wetter, no matter how much rain falls on me.

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Who is that with a neck and no head, two arms and no hands? What is it?