Question

What is the unit digit of (217)413 × (819)547 × (414)624 × (342)812?

Answer 1

2 will be the unit digit of (217)413.........

Answer 2

Answer:

Step-by-step explanation:

if 413 is divded by 4 then remainder will 1 so 217 unit digit is 7 and in second 819 when we dive 547 by 4 them remainder will 3 and unit digit will 9 and in third 414 624 is dived by 4 there is no remainder so it unit digit will be 4 and last 342 812 when we dived by 4 then remainder will be 0 it's unit digit will also 2 and after its multiply and last digit will 4.