Why are $60 and 120$ $60 and 120$ common multiples of $10 and 12 ?$ $10 and 12?$

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Answer 1 · 2017-09-30T15:33:07

Put simply, $120$ $120$ and $60$ $60$ are divisible by both $10$ $10$ and $12$ $12$ .

$\frac{120}{10} = 12$ $120/10 = 12$ ; $\frac{120}{12} = 10$ $120/12 = 10$ ; $\frac{60}{10} = 6$ $60/10 = 6$ ; $\frac{60}{12} = 5$ $60/12 = 5$ .

Answer 2 · 2017-10-01T08:08:40

Some numbers are common multiples of smaller numbers.

Write down the multiples of both $10 and 12$ $10 and 12$ :

$10: rarr" " 10,20,30,40,50,color(blue)(60),70,80,90,100,110,color(blue)(120),130,...$

$12: rarr" "12,24,36,48,color(blue)(60),72,84,96,108,color(blue)(120),132,144...$

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