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Re: Special Characters [#permalink]
07 Apr 2012, 08:27
This post received KUDOS
[m] = 3m when m is odd [m] = 1/2m when m is even what is x?
A 81 B 54 C 36 D 27 E 18
Question should read: For all positive integers m, [m]=3m when m is odd and [m]=(1/2)*m when m is even. What is * equivalent to?
A.  B.  C.  D.  E. 
Note that  is just some function such that "[m]=3m when m is odd and [m]=(1/2)*m when m is even".
So, [m]=3m when m is odd, [m]=(1/2)*m when m is even. As 9 is odd then  equals to 3*9=27; As 6 is even then  equals to 1/2*6=3;
So *=27*3=81. Note that numbers in the answer choices are also in boxes, so we have: [m]=81. m could be 27 (in this case as 27 is odd =3*27=81) OR 162 (in this case as 162 is even =162/2=81) --> only  is in the answer choices.
Re: For all positive integers m, [m]=3m when m is odd and [m]= [#permalink]
16 Jun 2014, 02:07
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