Question

What is the smallest number by which you have to multiply the
product 3 x 4 x 5 x 11 x 15 to get a perfect square number?
A
11
B
44
С
2475
D
9900
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Answer 1

11

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Answer 2

=3 X 4 X 5 X 11 X 15

=9900

So, if we multiply 9900 to 11 then it will become a perfect square, because all prime factors of 9900 is present in pairs except 11. The ans is 11.

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