What is the unit digit of 7^88?

Number System (Unit Digit) · Quantitative Aptitude · Medium · Practice for SSC CGL Tier 1

What is the unit digit of 7^88?

  1. 2
  2. 8
  3. 1
  4. 4
Answer and solution

Correct answer: C) 1

Unit digits of powers of 7 repeat every 4: 7, 9, 3, 1. 88 ÷ 4 leaves remainder 0, so take place 4 of the cycle: 1.

Learn the method: Number System (Unit Digit) rules and worked examples · SSC CGL Tier 1 Quantitative Aptitude

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