High School Maths Examples and Questions

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Answers − Lowest Common Multiple or Least Common Multiple

1.  Find the least common multiple of 3 and 5?
   Multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ...
   Multiples of 5 are: 5, 10, 15, 20, 25, 30, ...
   LCM of 3 and 5 is 15

2.  Find the least common multiple of 10 and 12?
   Multiples of 10 are: 10, 20, 30, 40, 50, 60, 70, ...
   Multiples of 12 are: 12, 24, 36, 48, 60, 72, ...
   LCM of 10 and 12 is 60

3.  Find the least common multiple of 5 and 7?
   Multiples of 5 are: 5, 10, 15, 20, 25, 30, 35, 40, 45, ...
   Multiples of 7 are: 7, 14, 21, 28, 35, 42, 49, ...
   LCM of 5 and 7 is 35

4.  Find the least common multiple of 3 and 8?
   Multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ...
   Multiples of 8 are: 8, 16, 24, 32, 40, 48, ...
   LCM of 3 and 8 is 24

5.  Find the least common multiple of 4 and 6?
   Multiples of 4 are: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44,...
   Multiples of 6 are: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, ...
   LCM of 4 and 6 is 12

6.  Find the least common multiple of 6 and 9?
   Multiples of 6 are: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, ...
   Multiples of 9 are: 9, 18, 27, 36, 45, ...
   LCM of 6 and 9 is 18

7.  Find the least common multiple of 3, 6 and 8?
   Multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ...
   Multiples of 6 are: 6, 12, 18, 24, 30, 36, 42, 48, ...
   Multiples of 8 are: 8, 16, 24, 32, 40, 48, 56, ...
   LCM of 3, 6 and 8 is 24

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