Find the ones digit of 73^356 Choose the correct option.
A) 1	B) 5	C) 6	D) 7	E) 9
The units digit of 73^356 will be the same as the units digit of 3^356.   3^1=3 --&gt; the units digit is 3;   3^2=9 --&gt; the units digit is 9;   3^3=27 --&gt; the units digit is 7;   3^4=81 --&gt; the units digit is 1;   3^5=243 --&gt; the units digit is 3 AGAIN;   ...   So, as you can see the units digit repeats in blocks of 4: {3, 9, 7, 1}, {3, 9, 7, 1}, ... Now, since 356=356+0=(multiple of 4)+0, then the units digit of 3^356 will be thus 1.   1nswer: 1.
<result>A</result>
Find the ones digit of 73^356