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The least number which is a perfect square and is divisible by each of the numbers 10, 20 and 24, is 

Answer:

Explanation:

Take LCM of 10, 20 and 24 = 120

So, 120 is the lowest number, which is divisible by 10, 20 and 24

So, from the options, 3600 is a multiple of 120 and its a pefect square,

also it is least value which satisfies all the conditions

So, the answer is 3600