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Unit Digit

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Unit Digit [#permalink]  24 Dec 2017, 00:27
Q. If the units digit of $$(x-1)^2$$ is 5 and the units digit of $$(x+1)^2$$ is 9, then determine the units digit of $$X^2$$.
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Re: Quants-Unit Digit [#permalink]  24 Dec 2017, 07:12
Expert's post

https://greprepclub.com/forum/rules-for ... -1083.html

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Re: Quants-Unit Digit   [#permalink] 24 Dec 2017, 07:12
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