Question

What will be the units digit of $6$${}^{10}$ + $5$${}^{10}$

• A. 1
• B. 2
• C. 3
• D. None of these

Answer 1

The correct option is A 1

We know that,

for $6^n$ the unit digit will always be $6$

similarly, for $5^n$ the unit digit will always be $5$

Given,

$6^{10}+5^{10}$

unit digit is $=6+5=11$

Hence the unit digit is $1$