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(x^3 + 19837)(x^2 + 5)(x – 3) an odd number?

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(x^3 + 19837)(x^2 + 5)(x – 3) an odd number?

by sanju09 » Sat Apr 04, 2009 6:03 am
x is a positive integer greater than two; is (x^3 + 19837)(x^2 + 5)(x – 3) an odd number?

(1) the sum of any prime factor of x and x is even

(2) 3 x is an even number
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by ontopofit » Sat Apr 04, 2009 6:26 am
B

What we should look for in the question is whether x is even or odd.

from 1) x can be 4(even) or 9(odd).so not sufficient.

from 2) we see that x is even, coz even*odd = even and 3 is odd. sufficient.
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