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find the least square number exactly divisible by 8,12,15.

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the least number divisible by 8,12,15 will be finding the lcm of these three numbers and the answer you will get is 120.

do the prime factorisation of 120, the answer you will get will be as follows:

2*2*3*5. now take off the non square numbers and add them.

next multiply them with 120 then you will get the final answer

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least square divisible by 8,12,15 is 
first lcm of 8,12,15 =120 
120 = 2*3*2*5*2 
now least sqare divisible by 8,12,15 is 2*2*3*3*2*2*5*5*2*2=3600
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