Multiple choice general knowledge math & puzzles

What will be the unit digit of the resulting number, if you add (2^31+3)^25 + ( 7^29-3)^23

  1. 5

  2. 8

  3. 6

  4. none

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The unit digit of (2^31+3)^25 + (7^29-3)^23 is 5. Breaking it down: (2^31+3) has unit digit (8+3)=11→1, so 1^25=1. (7^29-3) has unit digit (7-3)=4, and 4^23 has unit digit 4 (since 4^odd=4). Adding: 1+4=5. This tests understanding of unit digit patterns in powers.