Question

What will be the units digit of 11³+12²-13³-14²-15³+16⁴

Answer 1

for solving this question your only focus should be on the unit digit of all terms in the expression

unit digit of 11^3 = 1.
unit digit of 12^2 = 4
unit digit of 13^3 = 7
14^2 = 6
15^3 = 5
16^4 = 6
add with sign accordingly we get unit digit as 1+4+6 - 7+6+5 = -7....since it is negative we add 10 to get -7+ 10 =3