Multiple choice general knowledge math & puzzles

)Find the unit digit of 2166^2166 is

  1. 7

  2. 3

  3. 9

  4. 6
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Any power of a number ending in 6 will also end in 6. This is because 6 × 6 = 36 (ends in 6), and this pattern continues indefinitely. For 2166^2166, since the base ends in 6, the result must end in 6 regardless of the large exponent. This is a fundamental property of the digit 6 in base-10 arithmetic.

Keep practicing — related questions