Number, Unit digit, integer, square

[nashiruddin]

[Leaderboard]

How to Ask Better GRE Questions on Forums

Since GregMat (who is a very chill person) doesn’t have any specific formatting rules when it comes to asking questions on the forums, I feel like there should at least be a reference text of some sort that can help people ask better questions and make the process more enjoyable for those who try to answer them. The Golden Rule: Imagine You’re Trying To Answer the Question Before you post your question about GRE preparation, practice questions, or strategies, try to put yourself in the shoes of…

[thapliyalantara31]

Is the answer A?

[nashiruddin]

Yes. How you did?
Is the mentioned approach correct?
1 + 1 = 2 (units digit: 2)
2 + 4 = 6 (units digit: 6)
3 + 9 = 2 (units digit: 2)
4 + 6 = 0 (units digit: 0)
5 + 5 = 0 (units digit: 0)
6 + 6 = 2 (units digit: 2)
7 + 9 = 6 (units digit: 6)
8 + 4 = 2 (units digit: 2)
9 + 1 = 0 (units digit: 0)
0 + 0 = 0 (units digit: 0)

[thapliyalantara31]

Yes its fine
X+x^2 = x(1+x) is also fine