Aptitude - Square Root and Cube Root - Discussion
Discussion Forum : Square Root and Cube Root - General Questions (Q.No. 3)
3.
The least perfect square, which is divisible by each of 21, 36 and 66 is:
Answer: Option
Explanation:
L.C.M. of 21, 36, 66 = 2772.
Now, 2772 = 2 x 2 x 3 x 3 x 7 x 11
To make it a perfect square, it must be multiplied by 7 x 11.
So, required number = 22 x 32 x 72 x 112 = 213444
Discussion:
80 comments Page 6 of 8.
Vijay said:
1 decade ago
How can 22*32*72*112 = 213444 this is done in less than 10 sec?
Naveen said:
1 decade ago
How 7 square and 11 square came in last step please explain?
YASH said:
10 years ago
We divide all answer option by 21, 36, 66 and find a option.
Shristi said:
3 years ago
Why we have multiplied 2 3 7 11 square? Please explain me.
(6)
Devi said:
1 decade ago
Any shortcut way to find out L.C.M of two or more number.
Ganesh Policherla said:
9 years ago
We can get the perfect square must multiplied 7 x 11.
Malakarsidda said:
1 decade ago
How to sole this step 2772 = 2 x 2 x 3 x 3 x 7 x 11?
Nihal said:
10 months ago
Why should we square 7 and 11? Please explain to me.
(3)
Mohit said:
1 decade ago
Hey guys its simple. Please refer rakhi's answer. !
Laxmi said:
7 years ago
Why should we multiply by 7 and 11? Please tell me.
(1)
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