Question

The last digit of $2015!+3^{2015}$ is

Answer 1

Answer: 7

Last digit of $2015!$ is zero.
Now, $3^{2015}=3\left(3^{2014}\right)=3.9^{1007}=3{\left(10-1\right)}^{1007}$
Hence, last digit is $7$ .