combres wrote:

If x and y are positive integers, is x an even int?

1) x(y+5) is an even int

2) 6y^2 + 41y + 25 is even int

I can't seem to find a way for (2) to be an even integer no matter what I plug in and I think it is a waste of time to factor (2)

any ideas?

1) x can be ever or odd. Try x = 2 ,y=3 and x=3 y=3

Insuff.

2) nothing about X. but it does establish that y must be odd. here is why:

6y^2+41y+25

O=odd

E=Even

6(O)+41(O) +25 ---> E+O +O --> O +O--> Even

If y is even then 6(E) +41(E) +25---> E+E+O which is NOT even.

1&2:

X can still be even or odd. If y is odd then y+5 must be even. however, if x is odd O(E)=E or E(E)=E.

Insuff.

E