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Praetorian
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MartinMag
You have to know these precious rules:

O*O=O
E*O=O*E=E
E*E=E
same for /

O+O=E
O+E=E+O=O
E+E=E
same for -


What are the rules for /
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MartinMag
You have to know these precious rules:

O*O=O
E*O=O*E=E
E*E=E
same for /

O+O=E
O+E=E+O=O
E+E=E
same for -

What are the rules for /



Rules for (/) same as rules for (*)
Rules for (-) same as rules for (+)


Hope it helps
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Good point. I guess then that the rules for / are the same for * PROVIDED that the division is an integer.

The problem in question asks which one CANNOT be an integer. In choice D 4c/(b+a) COULD be an integer, but aplying the rules you find that it CANNOT be an ODD.



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