Question

Find the last digits of (456)^87*(307)^42

Answer 1

Step-by-step explanation:

find the last digits of (456)^87*(307)^42. Ask for details; Follow; Report. by Khannaarsh8 1 week ago. Log in to add a brainlist.

Answer 2

Answer:

4

Step-by-step explanation:

$456^{87}$ gives unit digit as 6 because 6 raised to any power will give 6 only.

whereas,

$307^{42}$ gives unit digit as 9 because the cyclicity of 7 is 4 and when 42 is divided by 4 gives remainder 2 and value at 2nd place in cycle of 7 is 9.

so 9*6 = 54

so unit digit will be 4