The question is #169 in the Quant Review book:
If n is a positive integer and n^2 is divisible by 72, then the largest positive integer that must divide n is...
(A) 6
(B) 12
(C) 24
(D) 36
(E) 48
The explanation provided in the book is not so clear to me. Can anyone help?
I find that I generally have trouble with such questions.
Here's another Data Sufficiency question that also pertains to divisibility (#110 in Quant Book)
Is the positive integer n a multiple of 24?
(1) n is a multiple of 4
(2) n is a multiple of 6.
When I review the concepts, I completely understand, yet I always have trouble with these sort of problems.
Thank you!
Divisibility Question - Need a better explanation
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MoniqueK wrote:The question is #169 in the Quant Review book:
If n is a positive integer and n^2 is divisible by 72, then the largest positive integer that must divide n is...
(A) 6
(B) 12
(C) 24
(D) 36
(E) 48
The explanation provided in the book is not so clear to me. Can anyone help?
I find that I generally have trouble with such questions.
Here's another Data Sufficiency question that also pertains to divisibility (#110 in Quant Book)
Is the positive integer n a multiple of 24?
(1) n is a multiple of 4
(2) n is a multiple of 6.
When I review the concepts, I completely understand, yet I always have trouble with these sort of problems.
Thank you!
Problem 1
https://www.beatthegmat.com/og-quant-rev ... 11652.html
Problem 2