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The LCM is: 40. To find the Least Common Multiple (LCM) of any two numbers:
- Find the factors which are common to both numbers; take these once.
- Find the factors which are not common, and take these.
- Multiply the common factors once by the other factors, and that is the Least Common Multiple.
- The factors of 8 are 2 x 2 x 2.
- The factors of 20 are 2 x 2 x 5.
The common factors (2 x 2) are bolded, so this is multiplied by the other non-common factors: (2 x 2) x 2 x 5 = 40.
40
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What is the LCM of 5 and 8 and 20?
The LCM of 5, 8 and 20 is 40.
