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Q 4. If n is the product of the integers from1 to 20 [#permalink]
13 Oct 2005, 12:51

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0% (00:00) wrong based on 0 sessions

Q 4.
If n is the product of the integers from1 to 20 inclusive, what is the greatest integer k for which 2k is a factor of n?
A. 10
B. 12
C. 15
D. 18
E. 20 _________________

Is the question correct? I mean n is a factor of n itself right? So n/2 would be the biggest k (since we know n is even and thus n/2 is an integer). In other words k would be 20!/2. The question may be asking about k as a product of prime numbers or something ... _________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

then you get another 2 from 4, you get 2 2s from 8, 12, you get another 2, from 16 you get 3 2s... and one more 2 from 20, so lets count all the 2s then

I´ve done an interview at Accepted.com quite a while ago and if any of you are interested, here is the link . I´m through my preparation of my second...

It’s here. Internship season. The key is on searching and applying for the jobs that you feel confident working on, not doing something out of pressure. Rotman has...