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 5 of 8.
Kumar said:
1 decade ago
How can 22 x 32 x 72 x 112 = 213444 - this be done in less than 10 secs?
VKS said:
1 decade ago
LCM = 2772
REQ TO MULTI 2772*11*7 TO MAKE PERFECT SQR
= 2772*77=213444
REQ TO MULTI 2772*11*7 TO MAKE PERFECT SQR
= 2772*77=213444
Karthik said:
1 decade ago
To make it a perfect square
Why should v multipled 7x11 with the lcm ?
Why should v multipled 7x11 with the lcm ?
Bilal said:
1 decade ago
How should we get to know that we have 2 tak out the lcm of that 3 no.
Gaurav said:
10 years ago
Can't understand how 7*11 is considered and what about 2*2 & 3*3?
Anshul said:
1 decade ago
How can we know that in which question we have to take lcm or hcf.
Rahul Gupta said:
1 decade ago
This solution is very confusing, kindly explain in simple manner.
Ramesh said:
6 years ago
How to square 7 & 11? Can anyone explain in shortcut method?
(4)
Saranya said:
1 decade ago
Why we should multiply 11*7?
Give any short cut method for lcm.
Give any short cut method for lcm.
Yassmin said:
9 years ago
A square number is when you times a number or numbers to itself.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers