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If k and t are integers

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Re: If k and t are integers

by cata1yst » Mon Jul 06, 2009 8:09 am
alexdallas wrote:any ideas?
thanks
I got A. None.

I just plugged in 6 and 5 into all the equations and didn't get a single even one.
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by alexdallas » Mon Jul 06, 2009 11:49 am
ok,,,so i guess plugging in is the best choice for this one...
tks.
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by walkingbanana » Mon Jul 06, 2009 2:00 pm
you can rephrase the question stem. if k^2-t^2 is odd, then one variable is even and one variable is odd.

i. if one variable is even and one variable is odd, k+t is odd + 2 is odd again
ii. k+t must be odd so squared, will still be odd
iii. one variable is odd, so added together, answer will be odd.

answer= none
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by alexdallas » Mon Jul 06, 2009 2:15 pm
true...tks.
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