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21 Mar 2011, 13:10
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I ended up with some pretty basic questions during my prep for GMAT and was hoping to find some help.
1) Is 0 considered even? (I was wrong on occasions when I assumed it was)
2) Are -2,-7,-11 etc.., considered primes also?
3) If an equation has a -/+ sign to it, can it be 0? For instance, for the examples, -n=m+1 or (-2)^(-n), can n still be 0?
4) Are -2,-4, -6 etc.., considered even integers ?
5) Is 0 a multiple of every number when solving "multiple" problems.
6) is (-2)^0 = +1? (Since any number ^0=1)
Thanks for your time!
1) Is 0 considered even? (I was wrong on occasions when I assumed it was)
2) Are -2,-7,-11 etc.., considered primes also?
3) If an equation has a -/+ sign to it, can it be 0? For instance, for the examples, -n=m+1 or (-2)^(-n), can n still be 0?
4) Are -2,-4, -6 etc.., considered even integers ?
5) Is 0 a multiple of every number when solving "multiple" problems.
6) is (-2)^0 = +1? (Since any number ^0=1)
Thanks for your time!
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21 Mar 2011, 13:26
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My answers in blue.
sameeraj
21 Mar 2011, 15:54
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In regards to (2), keep in mind that for any negative integer -X, without knowing anything else about X, we know that it has at least four factors: X, -1, -X, 1
