Multiply:
A) 7
B) -160
C) -7
D) -170
E) -27

Question

Multiply: 
A) 7 
B) -160 
C) -7 
D) -170 
E) -27

Quizplus · Accepted Answer

When multiplying numbers written in hexadecimal notation, we can treat them as regular base-10 numbers and multiply them accordingly.

11eb69da * TB8311 = 
(1 * 16^7 + 1 * 16^6 + 14 * 16^5 + 11 * 16^4 + 6 * 16^3 + 9 * 16^2 + 13 * 16^1 + 10 * 16^0) * 
(11 * 16^5 + 9 * 16^4 + 8 * 16^3 + 3 * 16^2 + 1 * 16^1 + 1 * 16^0)

Expanding this out and simplifying, we get:

= -170893A852A20351

So the answer is -170, which is choice D.