Jenna multiplied four numbers together and then divided by -2. The result was a positive value.

Which of the following statements MUST be true?

None of the factors were negative.
All of the factors were negative.
An odd number of factors were negative.
An even number of factors were negative.

Question

Jenna multiplied four numbers together and then divided by -2. The result was a positive value.

Which of the following statements MUST be true?

None of the factors were negative.
All of the factors were negative.
An odd number of factors were negative.
An even number of factors were negative.

compassionate · Answer

-x * x * -x * x = 

-x * -x * x 
x * x 
x 

/-2 

-x/-2

Therefore, "An even number of factors were negative." Cannot be true

If we had an odd number, like 1 or 3... 

-x * -x * -x * x /-2 
x * -x * x /-2 
-x * x/-2...