Teaser Tuesday! August 12, 2014

I hope everyone's ready for a fun - albeit a little mathy - brain teaser. Enjoy!

Note: If you could all please input your answers using the previously noted html code it will allow others to answer without having a spoiler. Copy it verbatim and do not stick any " or ' in your answer and it will work.

Question

The set of numbers {9, 99, 999, 9999, ...} has some interesting properties. One of these has to do with factorization. Take any number n that isn't divisible by 2 or by 5. You will be able to find at least one number in the set that is divisible by n. Furthermore, you won't need to look beyond the first n numbers in the set. Prove it.

Good luck!

2 Comments
 

Sequi velit harum velit. Optio nobis rerum enim culpa maiores perferendis consequuntur. Repudiandae vero velit ut. Eum quisquam inventore quibusdam corporis ex earum porro sed.

Molestiae amet et facilis hic dolor. Optio illo aut voluptatem eum. Omnis et optio veritatis alias labore quibusdam mollitia.

Et quasi assumenda impedit beatae quos. Recusandae commodi earum voluptatem.

"True humility is not thinking less of yourself; it is thinking of yourself less."

Career Advancement Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.8%
  • JPMorgan 01 98.2%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 01 98.8%
  • Evercore 01 98.2%
  • BMO Capital Markets 12 97.6%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.8%
  • Morgan Stanley 05 98.2%
  • JPMorgan No 97.7%
  • BMO Capital Markets 12 97.1%

Total Avg Compensation

June 2026 Investment Banking

  • Vice President (14) $434
  • Associates (43) $259
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (75) $151
  • Intern/Summer Analyst (67) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

1
redever's picture
redever
99.2
2
Secyh62's picture
Secyh62
99.0
3
kanon's picture
kanon
99.0
4
BankonBanking's picture
BankonBanking
99.0
5
CompBanker's picture
CompBanker
98.9
6
Betsy Massar's picture
Betsy Massar
98.9
7
DrApeman's picture
DrApeman
98.9
8
dosk17's picture
dosk17
98.9
9
GameTheory's picture
GameTheory
98.9
10
Jamoldo's picture
Jamoldo
98.8
success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”