Question

30.1
Find the unit digit of 19^2013+11^2013-6^2013​

Answer 1

Answer:

• when we put some power on 19 it's unit digit is always 1 , 9 and it's 2013 times and 2013 is a odd no. so the unit digit will be 1

• when we put some power on 11 it's unit digit is always 1

• when we put some power on 6 it's unit digit is always  6

now the solve this by the help of unit digits

so, 1+1-6= -5

there for unit digit = 5

THANK YOU