What is the unit digit of 13^38?

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

What is the unit digit of 13^38?

  1. 8
  2. 5
  3. 9
  4. 2
Answer and solution

Correct answer: C) 9

Unit digits of powers of 3 repeat every 4: 3, 9, 7, 1. 38 ÷ 4 leaves remainder 2, so take place 2 of the cycle: 9.

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

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