+0  
 
+1
1
45
1
avatar+311 

The ones digit of the fourth power of an integer cannot be...

 Jan 18, 2019
 #1
avatar+96201 
+1

.....1^4    ends in1

......2^4   ends in 6

......3^4   ends in 1

......4^4   ends in 6

......5^4   ends in 5

......6^4   ends in 6

......7^4  ends in 1

......8^4  ends in 6

......9^4 ends in  1

......0^4 ends in 0 

 

So....

 

3 is the answer

 

cool cool cool

 Jan 18, 2019

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