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# math is coool yyyyyyyyyyyyyyyyeeeeeeeeeeeeeeeesssssssssssssss

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What is the least common multiple of 12 and 15

Dec 10, 2015

#3
+8574
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Okay :)

Least common Multiple for 12: 12, 24, 36, 48, 60, 72, 84, ...

Least common Multiple for 15: 15, 30, 45, 60, 75, 90..

Was I any good?

Dec 10, 2015

#1
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Yes it is cool!!!!!!!!!!!!!!!!!!!! For you're question idk 3?

Dec 10, 2015
#2
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Hayley: try and see if you can answer this question.

Dec 10, 2015
#3
+8574
+4

Okay :)

Least common Multiple for 12: 12, 24, 36, 48, 60, 72, 84, ...

Least common Multiple for 15: 15, 30, 45, 60, 75, 90..

Was I any good?

Hayley1 Dec 10, 2015
#4
+2

Hayley: not quite. Look here:

12=2 X 2 X 3

15=3 X 5, therefore:

LCM=2 X 2 X 3 X 5=60, which is the correct answer.

Dec 10, 2015
#5
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Oh, okay! I see what i did wrong there! I did it a different way. They both go into 60. My bad! I see now.

Dec 10, 2015
#6
+109519
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Attn: Hayley1 and others

Ok you kids have got some concept problems here.

MULTIPLES

A multiple of a number is bigger to or equal to the number.

Multiples of 12 are 12, 24, 36, 48, 60, 72,  ........., 120      ....

Multiples of 15 are 15, 30, 45, 60, 75, 90,  .....,      120,     ....

The common multiples are the ones that are common to both lists.  that is  60,  120,  180, .......

The LEAST common multiple is  60  because that is the smallest common multiple.  It is the one with the LEAST value.

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FACTORS

The factors of 12 are   1, 2, 3, 4, 6, 12

The factors of  15 are  1, 3, 5, 15

So the HIGHEST common factor of 12 and 15 is 3

Dec 11, 2015