If integer x and y are distinct positive factors of 20,

Question

If integer x and y are distinct positive factors of 20, which of the following cannot be a factor of 20:

A) x-y
B) xy^2
C) x+2y
D) x-2y
E) (x+y)^2

kevincan · Answer

Factors of 20 = {1,2,4,5,10,20}

Only 1 and 4 are perfect squares, but neither 1 nor sqrt(4)=2 are the sum of two distinct factors of 20.

I choose E

anandsebastin · Answer

E 

A) x-y 5-4
B) xy^2 5*2^2
C) x+2y 1+2*2
D) x-2y 5-2*2

netcaesar · Answer

You are right. OA is C.

Thanks a lot.

anandsebastin · Answer

Did you mean OA is E?

yezz · Answer

If integer x and y are distinct positive factors of 20, which of the following cannot be a factor of 20: 

A) x-y B) xy^2 C) x+2yD) x-2y E) (x+y)^2

FACTORS OF 20 = 1,20,10,5,4,2,

E IS MY ANSWER

netcaesar · Answer

Sorry, it was my fault.

OA is E.

If integer x and y are distinct positive factors of 20,

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