2, 3, 5, 9, 17, _ What is the next number in the sequence?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

How many Watermelons are there in the below picture?

Find the smallest sentence with all the English alphabet.

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?