Question: Greatest Integer n

Comment on Greatest Integer n

The link to "GRE practice question (difficulty level: 160 to 170) - Urch.com" is working, but their site is down.
greenlight-admin's picture

If you scroll down further, you'll see the question (at least I can see it).

just a thought, is there a way to solve this without listing all of the factors of the even numbers in 2-20. I'm thinking that if you know 20 has a pair of 2 and 5 in it, you can determine the highest number of 2's and highest number of 5's in 20!
greenlight-admin's picture

It would be great to come up with a general solution like that, but I think the hard part is dealing with times when multiple 2's are hiding in 20!

That said, can you elaborate on how your strategy would play out?

Cheers,
Brent

Not related to this, but I wish there was a way to save the speed preference of the user so I do not have to fast forward each video.
greenlight-admin's picture

Good question.
I did some research, and that doesn't seem to be such an option.
I'll keep looking though, and get back to you if I find a solution.

Cheers,
Brent

This question would eat up an enormous amount of time with the method used to solve this problem that I highly doubt it will be a GRE question.
greenlight-admin's picture

Never say never :-)
The question isn't that much harder than this official question: https://greprepclub.com/forum/what-is-the-greatest-positive-integer-n-su...

Add a comment

Have a question about this video?

Post your question in the Comment section below, and I’ll answer it as fast as humanly possible.

Change Playback Speed

You have the option of watching the videos at various speeds (25% faster, 50% faster, etc). To change the playback speed, click the settings icon on the right side of the video status bar.

Let me Know

Have a suggestion to make the course even better? Email me today!

Free “Question of the Day” emails!