If n is an integer and n^4 is divisible by 10, which of the following could be the remainder when n is divided by 10? Choose one
A) 2
B) 5
C) 6
D) 8
E) 10
option 1   Remainder 2 means  10+2= 
<gadget id="calculator"> 10+2</gadget>
<output>12</output>
12   n^4= 12^4= 12*12*12*12/10 is not an integer   option 2   Remainder 5 means  10+5= 
<gadget id="calculator"> 10+5</gadget>
<output>15</output>
15   n^4= 15^4= 15*15*15*15/10 is not an integer   option 3   Remainder 6 means  10+6= 
<gadget id="calculator"> 10+6</gadget>
<output>16</output>
16   n^4= 16^4= 16*16*16*16/10 is not an integer   option 4   Remainder 8 means  10+8= 
<gadget id="calculator"> 10+8</gadget>
<output>18</output>
18   n^4= 18^4= 18*18*18*18/10 is not an integer   option 5   Remainder 10 means  10+10= 
<gadget id="calculator"> 10+10</gadget>
<output>20</output>
20   n^4= 20*20*20*20/10 is an integer means n^4 is divisible by 10 if we take n=10   so 10 is correct
<result>E</result>
If n is an integer and n^4 is divisible by 10, which of the following could be the remainder when n is divided by 10?