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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 5 - Mathematics
5.12 Prime Factorization and LCM

Method 2:
  1. Write the given numbers in a row.
  2. Think of a prime number that will divide atleast two of these numbers.
  3. We perform the division by writing the quotient in the next row.
  4. 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 12, 18, 24, 30 by division method.
380
360
345

 Q 2: Find by prime factorization the LCM of the following numbers 4, 5, 6
60
50
56

Q 3: Find the LCM of 6, 8, 10, 12, 14 by division method.
840
850
870

 Q 4: Find by prime factorization the LCM of the following numbers 12, 15, 18
120
160
180

Q 5: Find the LCM of 112, 168, 266 by division method.
6384
6300
6380

 Q 6: Find by prime factorization the LCM of the following numbers 10, 15, 20
50
60
54

Q 7: Find the LCM of 120, 210, 330 by division method.
9250
9240
9400

 Q 8: Find by prime factorization the LCM of the following numbers 8, 12, 16
40
42
48

Question 9: This question is available to subscribers only!

 Question 10: This question is available to subscribers only!


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