What is the LCM of 5 and 9?

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Answer 1 · 2017-06-27T14:54:27

It is #45#. See explanation.

The lowest common multiple (LCM) of numbers #a# and #b# can be calculated as:

#lcm(a,b)=(axxb)/gcd(a,b)#

where #gcd# is the greatedt common divisor

In the given example the greatest common divisor (gcd) is #1#, so the lowest common multiple is #lcm(5,9)=5xx9=45#

Answer 2 · 2017-06-27T17:33:45

#"LCM(5,9)=45"#

Multiples of #5:{5,10,15,20,25,30,35,40,color(red)45,50,55,60,...}#

Multpiles of #9:{9,18,27,36,color(red)45,54,63,72,....}#

#"LCM(5,9)=45"#