Hello,
I was wondering if anyone could help me with this question. I read the explanation at the back but I don't really understand it.
The question is:
What is the tens digit of the positive integer x?
1. X divided by 100 has a remainder of 30
2. X divided by 110 has a remainder of 30
What is the fastest way to find the what # gives you a remainder of 30 for statement 2? Or do I have to find it through trial and error?
Also can anyone give me some tips on how to do these remainder questions I always mess up on them.
OG 11 DS Question 148
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- jayhawk2001
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1 - Sufficient. X = 100n + 30. So tens digit has to be 3.nuku888 wrote:Hello,
I was wondering if anyone could help me with this question. I read the explanation at the back but I don't really understand it.
The question is:
What is the tens digit of the positive integer x?
1. X divided by 100 has a remainder of 30
2. X divided by 110 has a remainder of 30
What is the fastest way to find the what # gives you a remainder of 30 for statement 2? Or do I have to find it through trial and error?
Also can anyone give me some tips on how to do these remainder questions I always mess up on them.
2 - Insufficient. X = 110n + 30 = 100n + 10n + 30. So, tens digit
depends on n, which we don't know
Hence A