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primary 6 | Maths | Ratio
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Jesse
Jesse

primary 6 chevron_right Maths chevron_right Ratio chevron_right Singapore

I am trying this sec one question

Date Posted: 4 weeks ago
Views: 14
Phylicia Tong
Phylicia Tong
4 weeks ago
The answer cannot be 6. The LCM of 6 and 6 is 6!
24 = 2x2x2x3
Since 24 is a multiple of n, n MUST contain at the very least, the other 2 factors ie 2x2 since 6 = 2x3.

The answer cannot be 4 becos lcm of 4 and 6 is 12.
The answer is 8 ie 2x2x2.
The LCM of 8 n 6 is 24.
Note that n cannot be 12 ie 2x2x3 becos the lcm of 6 and 12 is 12.

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putin
Putin's answer
32 answers (A Helpful Person)
1st
1) Derive prime factors (anything that can be divided by 1 and itself)

2) common prime factors between the two numbers > multiply them
Phylicia Tong
Phylicia Tong
4 weeks ago
The answer is 8. The LCM of 6 and 8 is 24. The number 24 must contain all the factors of 6 and 8 (note that common factors of 6 and 8 are to be included only once).
Eg. 6 = 2x3
8= 2x2x2
Therefore, LCM = 2x2x2x3 = 24
putin
Putin
4 weeks ago
Oh I see where I went wrong, sorry ‘:(
Phylicia Tong
Phylicia Tong
4 weeks ago
No problem. We all make mistakes. Juz need to learn n move on. :))