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# m01 q35

Author Message
Intern
Joined: 01 Aug 2009
Posts: 20
Followers: 1

Kudos [?]: 49 [0], given: 3

m01 q35 [#permalink]  27 Dec 2009, 01:49
If $$@x$$ is the number of distinct positive divisors of $$x$$ , what is the value of $$@@90$$ ?

a)3
b)4
c)5
d)6
e)7

Kindly explain. Thank you!
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Intern
Joined: 23 Dec 2009
Posts: 27
Followers: 0

Kudos [?]: 41 [0], given: 7

Re: m01 q35 [#permalink]  27 Dec 2009, 04:00
prathns wrote:
If $$@x$$ is the number of distinct positive divisors of $$x$$ , what is the value of $$@@90$$ ?

a)3
b)4
c)5
d)6
e)7

Kindly explain. Thank you!

@@90 means that you have to find first the number of divisors of 90 ( @90). You can easily find that they are 12. Then find the divisor of 12 because @@90 is like @(@90) thus @12. The divisor of 12 are 1,2,3,4,6,12 therefore the right answer is d,6.
Re: m01 q35   [#permalink] 27 Dec 2009, 04:00
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# m01 q35

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