# The Number Five (Five). Mathematical Facts and Other Fun Facts About The Number 5

Lots of math facts about the number 5, such as its factors, multiples, name of a five sided polygon…

Here are some mathematical facts all about the number 5 (five).

The number 5 is the number between 4 and 6, and it is an odd number.

The factor pairs of 5 are:

1 × 5

Therefore, there are 2 divisors of 5, which are 1 and 5.

Also, the number 5 is the 3rd prime number after the number 3 (2,3,5…)

The number 5 is also the fifth Fibonacci number (0,1,2,3,5…)

The number 5 is also twin prime,with the number 3.

All multiples of 5 either end in 0 and 5.

If you double 5 you get 10 and half of 5 is 2.5.

5 squared is 25 (since 5 times 5 is 25).

Also, the cube of 5 is 125 (since 5 times 5 times 5 is 125)

The square root of 5 is 2.2 rounded to 1 decimal place

5% as a decimal is 0.05 and 1/20 as a fraction.

5 miles is about the same length as 8 kilometres (5 × 1.6).

5 gallons is about the same volume as 22.5 litres. (5 × 4.5)

5 pounds is a about the same weight as 2.3 kilograms (5 ÷ 2.2).

A 2D shape made up of 5 sides is called a pentagon. Also a 3D shape of made of 5 faces is known as pentahedron.

**Other facts about the number 5**

In Chemistry, 5 is the atomic number of boron.

The number 5 in roman numerals is V.

In Bingo, ball number 5 is called man alive.

In the United Kingdom, the M5 is the motorway which links Birmingham and Exeter.

The Olympic games is represent by 5 rings (5 continents)

In the new testament there are 27 books.

Liked it

On January 28, 2011 at 11:48 am

weird