How do you find the LCM of 7 and 9?

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How do you find the LCM of 7 and 9?

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Answer 1 · 2016-12-15T01:23:18

63

Explanation:

Since the only number that $7$ $7$ and $9$ $9$ go into evenly is $63$ $63$ we must consider this simple step:

$7 \cdot 9 = 63$ $7*9=63$

A least common multiple is the smallest unit that both numbers can evenly be divided by. Since you can evenly divide $63$ $63$ by both $7$ $7$ and $9$ $9$ the following is true:

$63$ $63$ is the least common multiple of $7$ $7$ and $9$ $9$ .

Answer: 63

Answer 2 · 2017-08-29T13:50:04

$L C M = 7 \times 9 = 63$ $LCM = 7 xx9 = 63$

Explanation:

$7 and 9$ $7 and 9$ have no common factor (apart from $1$ $1$ ).

Therefore the $L C M$ $LCM$ must contain the whole $7$ $7$ and the whole $9$ $9$ .

$L C M = 7 \times 9 = 63$ $LCM = 7 xx9 = 63$

This is clear if we write $7 and 9$ $7 and 9$ as the product of the prime factors:

$7 = 7$ $" "7 = 7$
$ul(" "9= " "3xx3)$

$LCM = 7 xx 3xx3 =63$

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How do you find the LCM of 7 and 9?

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