2022-08-14 19:00:02

- 1.What does 15 mean in maths?
- 2.What is the number 15?
- 3.Why is it called a +15?
- 4.What numbers added together equal 15?
- 5.What is the factor of 15?
- 6.How many ways can you make 15?
- 7.What are the multiples of 15?
- 8.What is the sum of the first 15 odd numbers?
- 9.What is the sum of 15 and the difference of 1?

What is number fifteen? In mathematics, the number 15 represents a quantity or value of 15. The whole number between 14 and 16 is 15. The number name of 15 is fifteen. 15 is 5 more than 10.

fifteen

15 (number)

← 14 15 16 → | |
---|---|

Cardinal | fifteen |

Ordinal | 15th (fifteenth) |

Numeral system | pentadecimal |

Factorization | 3 × 5 |

The system is so named because the skywalks are approximately 15 feet (approximately 4.5 metres) above street level. (Some Plus 15 skywalks are multi-level, with higher levels being referred to as +30s and +45s.)

List of Factor Pairs for 15

- 1 x 15 = 15.
- 3 x 5 = 15.
- 5 x 3 = 15.
- 15 x 1 = 15.

Factors of 15: 1, 3, 5, 15.

2:07

17:02

We need two numbers to add together to make 15. So if we put them in different groups we can have aMoreWe need two numbers to add together to make 15. So if we put them in different groups we can have a 10 and a 5 that would make the 15.

Here is the list of all multiples: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375, 390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, 735, …

225

Detailed Solution

The sum of first 'n' odd numbers is n. So Here 'n' is 15. So Sum of first 15 odd numbers is 15 = 225.

The sum of first 'n' odd numbers is n. So Here 'n' is 15. So Sum of first 15 odd numbers is 15 = 225.

Therefore, the numbers are 8 and 7.