The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

If a wheel has 54 spokes, how many spaces are there between the spokes?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

You see me once in June, twice in November, and not at all in May. What am I?

What do you call a fish without an eye?

What is full of holes but still holds water?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

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 ?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?