The sum of two numbers is 12. One number is x. The other number is ______.

1st number | 2nd number | sum |
---|---|---|

2 | 10 | 12 |

6 | 6 | 12 |

4 | 8 | 12 |

x | 12 - x | 12 |

Herein, what is the common denominator of 12 and 15?

Consider the numbers 12 and 15 again: The multiples of 12 are : 12, 24, 36, 48,

**60**, 72,**84**, . The multiples of 15 are : 15,**30**, 45,**60**, 75,**90**, .**60**is a common multiple (a multiple of both 12 and 15), and there are no lower common multiples.What is the least common denominator of 12 and 8?

Step 1: List the Multiples of Each Number

Multiples of 8 | Multiples of 12 |
---|---|

8 x 3 = 24 | 12 x 3 = 36 |

8 x 4 = 32 | 12 x 4 = 48 |

8 x 5 = 40 | 12 x 5 = 60 |

8 x 6 = 48 | 12 x 6 = 72 |

What is the lowest common multiple of 12 and 15?

The multiples of

**15**are :**15**, 30, 45, 60, 75, 90, . 60 is a common multiple (a multiple of both**12 and 15**), and there are no lower common multiples. Therefore, the**lowest common multiple of 12 and 15**is 60.