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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 6 - Mathematics
1.39 LCM - Least Common Multiple

Some Important Points:

1. To get the multiples of a given natural number, we have to multiply the given natural number by various natural numbers.

2. There is no end to the multiples of a given natural number. That is, the set of the multiples of a given natural number is infinite.

3. Two natural numbers can have countless common multiples. The set of common multiples of two natural numbers is infinite.

4. The smallest of the common multiples of two or more natural numbers is called their least common multiple (L.C.M.).

5. If two numbers are co-prime, then their L.C.M. is equal to their product.

6. Given two numbers, if the first number is a multiple of the second number, then their L.C.M. is equal to the first number.

Example: Find the L.C.M. of the 30 and 48.

Therefore, L.C.M. of 30 and 48 is = 2 x 3 x 5 x 8 = 240.


Directions: Find the L.C.M. of the given numbers using the above method. Also write at least 10 examples of your own.
Q 1: Find the L.C.M. of 16, 30.
200
240
250

Q 2: Find the L.C.M. of 40, 140.
280
200
250

Q 3: Find the L.C.M. of 5, 7, 11.
350
385
365

Q 4: Find the L.C.M. of 570, 665, 266.
75000
75810
75800

Q 5: Find the L.C.M. of 665, 266.
1300
1350
1330

Q 6: Find the L.C.M. of 23, 69.
69
23
120

Q 7: Find the L.C.M. of 50, 60, 70.
2100
1500
2000

Q 8: Find the L.C.M. of 3, 5, 13.
185
195
150

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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