How many sides does a circle have?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Find the next number in the series

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

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What has one eye, but can’t see?

I have branches, but no fruit, trunk or leaves. What am I?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

Why is 6 afraid of 7?