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Len n be a positive integer and n>3. Find the last digit of 7^n!

 

 

 

TYSM

 Mar 16, 2021
 #1
avatar+201 
+2

there are multiple answers...

 

we have the cycle of powers for 7 for above 3 is:

 

 

 

4. 1

5.7

6. 9

7. 3

 Mar 16, 2021
 #2
avatar+130 
+1

1 is correct!

HelpPls123abc  Mar 16, 2021

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