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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 |
| 20-7^0 | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 20-(7*0)! | Bob Chen | 8 | Northwest Junior High |
| 20-(7^0) | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| 20-7^0 | Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| 20-(0x7)! | Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| 20-7^0 | Tran Ha Duong | 9 | 3h, Hwa Chong Institution |
| Sqrt((7-0!)!/2+0!) | Michael Endick | 8 | Foothill Middle School |
| 20-7^0 | Tim Freborg | 7 | Hudson Montessori |
| 20-7^0 | Sam F | 6 | Parker Middle School |
| 20-7^0 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 20-7^0 | Chan Tuck Ging | 7 | Hwa Chong Institution |
| 20-7^0 | Aly G. | 6 | Parker Middle Shcool |
| 20-7^0 | Cara Hudak | 8 | Hudson Montessori Middle Scholl |
| 20-(7^0) | Lee Zi Jian | 8 | Hwa Chong Instituion |
| 20-(7^0) | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 20-(7^0) | Chow Zheng Jie | 9 | Hwa Chong Institution |
| 20-(7^0) | Ng Xu Jie | 8 | Hwa Chong Institution |
| 20-7^0 | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 20-7^0 | Tan Song Kai | 8 | Hwa Chong Institution |
| 20-(0^7)! | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 20-(7^0) | Delwin Koh | 8 | Hwa Chong Institution |
| 20-7^0 | Benjamin Low | 8 | Hwa Chong Institution |
| 20-7^0 | Amanda L. | 6 | Parker Middle School |
| 20-7^0 | Connor M. | 6 | Parker |
| 20-7^0 | Jessica M | 7 | Mount Olive Middle School |
| 20-7^0 | Margaret M. | 6 | Parker Middle School |
| 20-7^0 | Natalie M. | 6 | Parker Middle School |
| 20-7^0 | Ng Jun Da Nelson | 8 | Hwa Chong Instituition |
| 20-7^0 | Yuxiao Ning | 12 | Hoboken High School |
| 20-7^0 | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 20-7^0 | Adam Roenberg | 7 | Hudson Montessori School |
| 20-7^0 | Glenn Goh Rongjie | 9 | Hwa Chong Insituition |
| 20-7^0 | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 20-7^0 | Caylie Scherba | 8 | Hudson Montessori Middle School |
| 20-7^0 | Nayan Shah | 8 | Hudson Montessori School |
| 20-0^7 | Darren Toh | 9 | Hwa Chong Institution |
| 20-7^0 | Henry Trimpe | 1 | Hudson Montessori School |
| 20-7^0 | Natalie V. | 6 | Parker Middle School |
| 20-7^0 | Ang Chong Wei | 9 | Hwa Chong Institution |
| 20-7^0 | Chong Zhi Wei | 7 | Hwa Chong Insitution |
| 20-7^0 | Tan Yi Wei | 7 | Hwa Chong Institution |
| 20-7^0 | Abby W. | 6 | Parker Middle School |
| 20-(0x7)! | Lim Han Xin | 7 | Hci |
| 20-(0x7)! | Shaun Lum Yu Xuan | 3 | Hwa Chong Institution |
| 20-7^0 | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| 20-7^0 | 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 |
| 20-[(0*7)!] | Ng Soon Zhou | 7 | Hwa Chong Institution Highschool |
| 20-7^0 | Yu Zhou | 1 | Hwa Chong Institution |
| 20-7^0 | Jared | 6 | Parker Middle School |
| 20-7^0 | Marissa | 7 | Mount Olive Middle School |
| 20-0!^7 | NergüL | 10 | ÖZel Fatih Sultan Lisesi |
| 20-7^0 | Yuanxi | 9 | Hwa Chong Institution |
Please notify Judy Ann Brown of any errors.
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