What is the units digit of the expression 14^7−20^4? Options:
A) 8
B) 3
C) 4
D) 6
E) 0
I think answer on this one should be A too. Since we know that 14^7&gt;20^4, as Will said one should always check if the number is positive.
<result>A</result>
What is the units digit of the expression 14^7−20^4?