The negative number c is divisible by 2. What is the remainder when dividing 5(7-c)(9+c) by 2?
Choose the most appropriate option:
A) 0
B) 1
C) 2
D) 3
E) 4
When we multiply any of these options: 5*11*5 (c=-4) or 5*17*-1 (c=-10) we end up with numbers ending in 5; so any number ending in 5 divided by 2 will always leave a remainder of 1. Hence the correct answer is 1.
<result>B</result>
The negative number c is divisible by 2. What is the remainder when dividing 5(7-c)(9+c) by 2?