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This Web page is intended to record solutions submitted by students in
grades three through twelve.
Submissions will be posted starting February 1, 2007.
Rules: use the digits in the year 2007 and the operations of +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial), along with grouping symbols, to write expressions for the counting numbers 1 through 100. Please read and follow the rules carefully. Teachers may print out worksheets for students to record their findings, or print sheets of manipulatives for students to use.
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| Solution | Name | Grade | School |
| 20+7-0! | Kate Ahrens | 7 | Mount Olive Middle School |
| (20-0!)+7 | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 27-0!-0 | Neal Amos | 10 | Brookstone School |
| 27-0!+0 | Janine A. | 6 | Parker Middle School |
| 27+0^0 | Brandon Cepas | 7 | Rohrer Ms |
| 27-0!-0 | Bob Chen | 8 | Northwest Junior High |
| 20+7-0! | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| 27-0*0 | Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| 27-0!-0 | Billy C. | 6 | Parker Middle School |
| 20-0!+7 | Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| 27-0^0
27-0!+0 |
Tran Ha Duong | 9 | 3h, Hwa Chong Institution |
| 27-0!+0 | Michael Endick | 8 | Foothill Middle School |
| 20-0!+7 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 20+7-0! | Chan Tuck Ging | 7 | Hwa Chong Institution |
| -0!+20+7 | Maggie G. | 6 | Parker Middle School |
| 20-0!+7 | Wu Zi Hao | 9 | Hwachong Institution |
| 27-0^0 | Yeo Si Heng | 8 | Hwa Chong Instituition |
| 27-0!-0 | Cara Hudak | 8 | Hudson Montessori Middle Scholl |
| 20+7-0! | Lee Zi Jian | 8 | Hwa Chong Instituition |
| 20+7-0! | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 27-0!-0 | Ng Xu Jie | 8 | Hwa Chong Institution |
| 20+7-0! | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 27-0!-0
20+7-0! |
Tan Song Kai | 8 | Hwa Chong Institution |
| (20+7)-(0!) | Olivia Kamensky | 8 | Brookstone School |
| 27-(0!+0) | Tim Kenna | 7 | Rohrer Middle School |
| 27-(0!)+0 | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 27-(0!+0) | Delwin Koh | 8 | Hwa Chong Institution |
| 27 - 0^0 | Won Cheng Yi Lewis | 9 | Hwa Chong Institution |
| 27-0^0 | Amanda L. | 6 | Parker Middle School |
| 7+20-0! | Kelley Mcintire | 9 | Brookstone |
| 27-0!-0 | Jessica M | 7 | Mount Olive Middle School |
| 27-0!+0 | Margaret M. | 6 | Parker Middle School |
| 20-0!+7 | Ng Jun Da Nelson | 8 | Hwa Chong Instituition |
| 20+7-0! | Yuxiao Ning | 12 | Hoboken High School |
| 27-0!+0 | Ow Zhen Quan | 8 | Hwa Chong Institution |
| 27-0-0! | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 27-0!+0 | Glenn Goh Rongjie | 9 | Hwa Chong Insituition |
| 27-0!-0 | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 27-0!-0 | Caylie Scherba | 8 | Hudson Montessori Middle School |
| (27-0!)-0 | Kassidy Schmidt | 1 | Rohrer Ms |
| 27-0!-0 | Nayan Shah | 8 | Hudson Montessori School |
| 27-0^0 | Katie S | 6 | Parker Middle School |
| 20-0!+7 | Darren Toh | 9 | Hwa Chong Institution |
| 20-0!+7 | Ang Chong Wei | 9 | Hwa Chong Institution |
| 20-0!+7 | Chong Zhi Wei | 7 | Hwa Chong Insitution |
| 27-0!-0 | Tan Yi Wei | 7 | Hwa Chong Institution |
| 27-0^0 | Abby W. | 6 | Parker Middle School |
| 20+7-0! | Lim Han Xin | 7 | Hci |
| 20-0!+7 | Shaun Lum Yu Xuan | 3 | Hwa Chong Institution |
| 27-0^0 | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| 27-0!+0 | Lee Jun Yi | 8 | Hwa Chong Institution |
| 20-0!+7 | Low Kah Yi | 9 | Hwa Chong Institution |
| 20+7-0! | Zhou Yifan | 3 | Hwa Chong Institution |
| 27-0!-0 | Zou Xiang Yu | 7 | Hwa Chong Institution |
| 27-(0!)+0 | Xiao Yuting | 8 | Hwa Chong Institution |
| 27-(0!)-0 | Ng Soon Zhou | 7 | Hwa Chong Institution Highschool |
| 20-0!+7 | Yu Zhou | 1 | Hwa Chong Institution |
| 20+7-0! | Chrissa | 6 | John F. Kennedy School |
| 20-(0!-7) | NergüL | 10 | ÖZel Fatih Sultan Lisesi |
Please notify Judy Ann Brown of any errors.
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