1. What is the last digit of $11^{6}+14^{6}+16^{8}$?
1. The last digit of the given sum can be determined by adding the last digits of each power: the last digit of any power of a number ending in 1 and 6 remains 1 and 6, the last digit of an even power of a number ending in 4 is 6. Therefore, the last digit of the given sum is 3.