Question

Find the least square number which is exactly divisible by 10, 12, 15 and 18 ? (1) 900 (2) 400 (3) 1600 (4) none

Answer 1

it's 900. that is option 1

Answer 2

Concept introduction:

LCM is least common multiple. It is a number which is commo multiple of given set of numbers.

Explanation:

Given that, set of numbers $10,12,15,18$.

We have to find, least square number which is exactly divisible by $10, 12, 15, 18$.

According to the question,

$400$ and $1600$ are not divisible by $3$ and also LCM of $10,12,15,18$ is $180$ hence the perfect square which is divisible by these numbers should be multiple of $180$ hence the answer is $900$.

Final Answer:

$(1) 900$ is least squared number to be divisible by $10,12,15,18$.

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