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Re: If a and b are both odd integers [#permalink]
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because in this case regardless the sign of the number you are looking for which one is EVEN

negative even or positive even , does not matter
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Re: If a and b are both odd integers [#permalink]
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Since a and b are odd

A (a-b)(a^2 + ab + b^2)

a-b = odd-odd which gives even. We dont need to consider other part, A will always be even.


B a^b + b^a gives odd + odd. Always even


C b^2 + 3ab + b^2 odd + odd + 0dd = even + odd = odd


D a^3 + b^3 + 3ab(a+b)

odd + odd + even

even + even = Always even

Answer A,B and D


Adewale Fasipe, quant instructor, Lagos Nigeria.
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Re: If a and b are both odd integers [#permalink]
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