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MathRevolution
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==> In the original condition, the answer is highly likely to be D since there is 1 variable(n), and it becomes 1)=2) so the remainder of both is 3, hence unique, and suffi. The answer is D.
Answer: D

- Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and independent equations ensures a solution.
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When a positive integer n is divided by 7, what is the remainder?
1) When n-294 is divided by 7, the remainder is 3
2) n-3 is divisible by 7

First 7k=multiple of 7 for k>=0

(1) Sufficient

n-294=7k+3
n=7k+(42)(7)+3
n=7(k+42)+3 --> multiple of 7, plus 3. The reminder is 3

(2) Sufficient

n-3=7k
n=7k+3 --> multiple of 7, plus 3. The reminder is 3

Answer (D)
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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