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  • math & puzzles Online Quiz - 127
  • What is the unit digit of 3^1244?
Multiple choice general knowledge math & puzzles

What is the unit digit of 3^1244?

  1. 1

  2. 3

  3. 7

  4. 9

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A Correct answer
Explanation

The unit digit of powers of 3 cycles in a pattern: 3, 9, 7, 1. Since 1244 is divisible by 4 (1244/4 = 311 with remainder 0), 3^1244 has the same unit digit as 3^4, which is 1.

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