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Grade 5 - Mathematics
5.12 Prime Factorization and LCM
Method 2:
Write the given numbers in a row.
Think of a prime number that will divide atleast two of these numbers.
We perform the division by writing the quotient in the next row.
If a number is not divisible by the prime factor, we copy it to the next row.
Example:
Find the LCM of 8, 6, 4, 3.
LCM = 2 x 2 x 3 x 2
Answer: 24
Directions:
Find the LCM using the division method. Also write at least 5 examples of your own.
Q 1
: Find the LCM of 120, 210, 330 by division method.
9240
9250
9400
Q 2
: Find the LCM of 16, 20, 24 by division method.
250
260
240
Q 3
: Find the LCM of 12, 18, 24, 30 by division method.
345
360
380
Q 4
: Find the LCM of 16, 24, 15 by division method.
240
250
245
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Question 6: This question is available to subscribers only!
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