Question

Exercise 3.6
1. Find the L.C.M. of the following numbers by listing their multiples
(a) 4.5
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Answer 1

Question:

1. Find the L.C.M of the following numbers by listing their multiples.

(a) 4,5

Answer:

20

Method:

4 × 1 = 4 ${|}$ 5 × 1 = 5

4 × 2 = 8 ${|}$ 5 × 2 = 10

4 × 3 = 12 ${|}$ 5 × 3 = 15

4 × 4 = 16 ${|}$ 5 × 4 = 20

4 × 5 = 20

Here, we find that the least common number (multiple) between the two numbers 4 and 5 is 20. Even though there are many common multiples of 4 & 5 like 200, 2000.. , the question is to find the least or smallest, common multiple.

Hence,

$\huge \mathtt \red{♡Answer:}$

The L.C.M of 4&5 by listing the multiples is 20