What is the LCM of 10 and 4?

Question

60504 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-01-08T15:05:11

$LCM=20$

multiples of $10:{10,color(red)(20),30,40,50,...}$

multiples $4:{4,8,12,16,color(red)(20),24,28,32,36,40,...}$

common multiples ${20,40,....}$

The first shared value is 20 so LCM = 20

Answer 2 · 2017-01-09T10:24:22

20

Multiply 10 by any whole number and the last digit will be 0. So we need the first multiple of 4 that will give a 0 as the last digit.

This is $4xx5=20$

So the LCM = 20