Hi,
I know the answer to this ... but am interested in learning about the various approaches people take to answer this one.
You thinking/logic to answer this please.
Thanks.
II
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The function f is defined for all ...
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parallel_chase
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let n= 9
F(n) = 1,2,4,5,7,8
Similarly,
if p is prime number, lets say 5
f(p) = 1,2,3,4
if p = 7
f(p) = 1,2,3,4,5,6
if p=11
f(p) = 1,2,3,4,5,6,7,8,9,10
Clearly from above pattern we can say that p-1 is the answer.
Hence A
F(n) = 1,2,4,5,7,8
Similarly,
if p is prime number, lets say 5
f(p) = 1,2,3,4
if p = 7
f(p) = 1,2,3,4,5,6
if p=11
f(p) = 1,2,3,4,5,6,7,8,9,10
Clearly from above pattern we can say that p-1 is the answer.
Hence A
No rest for the Wicked....
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cramya
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Similar approach to what paralle chase did. I am sure we will be checking atleast one more prime (alteast I will) to make sure it is p-1 in the real GMAT.ANY PRIME...is the helper in the kitchen:
Like I always say different minds think differently(may be u will stop wiht just 1 and be 100% confident about it
)I got to play catch up for the extra 5-10 secs I took to check with one/two more primes
Regards,
CR
