7.1.3 Lowest common multiples

Fill in the Blanks

Find the lowest common multiple (LCM) of 5 and 10.

Multiple Choice

12 is the common multiple of two numbers. What are the numbers?

• 1 and 6

• 2 and 6
• 4 and 5
• 3 and 4

Multiple Choice

The first three common multiples of 36 and 42 are 252, 504 and 756. What are their next 3 common multiples?

• 864, 1000, 1200
• 1008, 1260, 1512
• 800, 1400, 1600
• 900, 1100, 1300

Open Ended

The first three common multiples of 36 and 42 are 252, 504 and 756. Their next 3 common multiples are 1008, 1260, 1512. How do you get that?

Multiple Choice

A game board has numbers on each space. Starting from space 0, Sam jumps 5 spaces each turn, Bill jumps 6 spaces each turn and Anne jumps 8 spaces each turn. What is the first space that they will all land on?

• 100
• 130
• 120
• 110

Open Ended

A game board has numbers on each space. Starting from space 0, Sam jumps 5 spaces each turn, Bill jumps 6 spaces each turn and Anne jumps 8 spaces each turn. How you explain to your friends why they are going to meet at the 120th spot?

Multiple Select

Which of the following pairs of numbers have 6 as their lowest common multiple?

• 2 and 3

• 3 and 6

• 2 and 4

• 2 and 6

Open Ended

Do you have any questions about finding the lowest common multiple, or would you like to learn more about this topic?

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