The only way the Sum/difference can be odd is if E + O = O or E - O = O
sincs E^2 = E and O^2 = O
Choice 1: E + O = O; So this rules out the first possibility
Choice 2: E + E (2 times any number is E) + O = O; So this rules out the second possibility
Choice 3: E + O = O; Same as the first choice so this rules out the third possibility as well.
So the answer left is (A)
K^2 - t^2
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Plug in k=3 and t=2
both k and t are integers and both satisfy the condition
k^2 -t^2 = 9 - 4 = 5(odd integer)
So we find that none of the conditions are full-filled.
So answer none.
both k and t are integers and both satisfy the condition
k^2 -t^2 = 9 - 4 = 5(odd integer)
So we find that none of the conditions are full-filled.
So answer none.
