Interview Q&A / Aptitude
Aptitude interview questions
Quantitative shortcuts for placement tests: percentages, time and work, and more.
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- What is the unit digit of 7^95?
The answer is 3. Unit digits of powers of 7 repeat in a cycle of four (7, 9, 3, 1). 95 leaves remainder 3 when divided by 4, so 7^95 ends like 7^3, which ends in 3.
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