Maths LCM
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Re: Maths LCM
my answer is also 9
but it seems 18 is LCM of 3 and 9, this was told to my kid
3 6 9 12 15 18
9 18 27 36
hence 18
but it seems 18 is LCM of 3 and 9, this was told to my kid
3 6 9 12 15 18
9 18 27 36
hence 18
Re: Maths LCM
But in that example, the series still intersect at 9...?oxyeleven wrote:my answer is also 9
but it seems 18 is LCM of 3 and 9, this was told to my kid
3 6 9 12 15 18
9 18 27 36
hence 18
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Re: Maths LCM
Wrong - it is 9 [Graduate mathematician and qualified teacher] - LOWEST common multipleoxyeleven wrote:my answer is also 9
but it seems 18 is LCM of 3 and 9, this was told to my kid
3 6 9 12 15 18
9 18 27 36
hence 18
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Re: Maths LCM
LCM means lowest common multiple
IF they asked what is the LCM of 3,9
Multiples of 3 are 3,6,9,12,15,18,21,24,27,30
Multiples of 9 are 9,18,27,36,45,54,63,72,81,90
Common multiples of 3,9 are 9,18,27,36,45,54,63,72,81,90
Among the common multiples what is the lowest common multiple of 3,9?..Answer is 9..
18 is a common multiple of 3,9 but not the lowest common multiple..
If there are two numbers A,B, A is a smaller number and B is a bigger number.
If A goes into B then the LCM of A,B is B
Examples : LCM of 3,15 answer is 15
Lcm of 4,16 Answer is 16...
IF they asked what is the LCM of 3,9
Multiples of 3 are 3,6,9,12,15,18,21,24,27,30
Multiples of 9 are 9,18,27,36,45,54,63,72,81,90
Common multiples of 3,9 are 9,18,27,36,45,54,63,72,81,90
Among the common multiples what is the lowest common multiple of 3,9?..Answer is 9..
18 is a common multiple of 3,9 but not the lowest common multiple..
If there are two numbers A,B, A is a smaller number and B is a bigger number.
If A goes into B then the LCM of A,B is B
Examples : LCM of 3,15 answer is 15
Lcm of 4,16 Answer is 16...