You need to arrange three 7 and mathematical symbols to form number 1?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

What 5-letter word typed in all capital letters can be read the same upside down?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

What is at the end of a rainbow?

Which flower has two lips?

What occurs twice in a week, once in a year but never in a day?

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 ?