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

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

If eleven plus two equals one, what does nine plus five equal?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

I have no life, but I can die. What am I?

How is the moon similar to a dollar?

What can go up a chimney down, but can’t go down a chimney up?