Number System Practice Test 6

Question : 2 of 12

Marks: +1, -0

Find the least number by which 90 is to be multiplied so that it becomes the multiple of 135.

Solution:

90=3^2×5^1×2^1

90 is not a prime, is a composite number;

135 = 3^3 × 5^1

135 is not a prime, is a composite number;
So, lcm( 90; 135) = 270 =

2 × 3^3 × 5

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