Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What is wrong in the below Picture?

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

John bought 150 chocolates but he misplaced some of them. His Father asked him how many chocolates were misplaced.
He gave the following answer to him:
If you count in pairs, one remains
If you count in threes, two remain
If you count in fours, three remain
If you count in fives, four remain
If you count in sixes, five remain
If you count in sevens, no chocolate remains.

Can you analyze the statements and tell us how many chocolates were lost?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What does this rebus means ?

If your uncle’s sister is not your aunt, what relation is she to you?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.