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What is the units digit of positive integer p?

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Re: What is the units digit of positive integer p?

by swerve » Thu Dec 03, 2020 11:00 am

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BTGmoderatorDC wrote: ↑
Wed Dec 02, 2020 5:25 pm
 What is the units digit of positive integer p?

(1) When p is divided by 10, the remainder is 8
(2) When p is divided by 11, the remainder is 8



OA A

Source: Veritas Prep
Units digit \(=?\)

Statement 1:
\(p = 10k + 8 \Rightarrow p = 8, 18, 28,\ldots \Rightarrow\) Units digit is always \(8\). Sufficient \(\Large{\color{green}\checkmark}\)

Statement 2:
\(p = 11k + 8 \Rightarrow p = 8, 19, 30, \ldots \Rightarrow\) Units digit is not always the same. Not Sufficient \(\Large{\color{red}\chi}\)

Therefore, A
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