810 cubic centimeters equals 49.5 cubic inches.

A box in cube shape would have sides equal to approximately 3.7 inches.

A jeweler might sell you a large ring and put it in a box that size.

From the Internet---

*The Fundamental Principle of Counting:*

*If something can be chosen, or can happen, or be done, in m different ways, and, after that has happened, something else can be chosen in n different ways, then the number of ways of choosing both of them is *

*m Â· n.*

Each entry came result in 4 exits.

There are 5 entries.

4 X 5 = 20

Calculator.

The one after 5 but before 7!

1/2 of ?

Seriously it's one half of a question mark

1/10th of 60.

The abacus, also called a counting frame, is a calculating tool that was in use in Europe, China and Russia, centuries before the adoption of the written Hinduâ€“Arabic numeral system.

The exact origin of the abacus is still unknown. Today, abaci are often constructed as a bamboo frame with beads sliding on wires, but originally … Read more

519 nickels

32 1/2 dimes

Don't ask about the half dime.

It doesn't contribute, it is the main ingredient in engineering.

Contributed? Is it the base for engineering? It is used to calculate load, weight, size, angles...

Two and a half hours (when the little hand is on the one and the big hand is on the three).

Seriously?

3 years, 22 hours, 27 minutes, and 5.8 seconds.

You're kidding, right?

5,500,000