Question : What is the unit digit of $125^{125}+216^{216}$?
Option 1: 5
Option 2: 1
Option 3: 6
Option 4: 7
Answer (1)
24th Jan, 2024
Correct Answer: 1
Solution :
Given:
125
125
+ 216
216
Any power of 6 gives the unit digit 6, and also any power of 5 gives the unit digit 5.
Unit digit → 5 + 6 → 11 →1
So, the unit digit of 125
125
+ 216
216
is 1.
Hence, the correct answer is 1.
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