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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 |
| 20+7+0! | Collin Andrew | 7 | Rohrer G. Middle School |
| 27+0!+0 | Abbie Basso | 7 | Rohrer Middle School |
| 27+0!+0 | Gina Bossi | 7 | Rohrer Middle School |
| 27+0^0 | N. B. | 6 | Parker Middle School |
| 27-0+0! | Bob Chen | 8 | Northwest Junior High |
| 20+7+0! | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| 20+0!+7 | Paxton Chia | 8 | Hwachong Institution |
| 0^0+27 | Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| 20+0!+7 | Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| (((0!)+(0!))^2)x7 | Noah Delius | 6 | John F. Kennedy School, Berlin, Germany |
| 7x(0!+0!)x2 | Tran Ha Duong | 9 | 3h, Hwa Chong Institution |
| 27+0!+0 | Michael Endick | 8 | Foothill Middle School |
| (2+0!+0!)x7 | Lim Yu Sheng Fabian | 9 | Hwa Chong Institution |
| 7(2+0!+0!) | Sophie Farah | 8 | Hudson Montessori Middle School |
| 20+0!+7 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 20+7+0! | Chan Tuck Ging | 7 | Hwa Chong Institution |
| 20+0!+7 | Wu Zi Hao | 9 | Hwachong Institution |
| 27+0!-0 | Nicholas Heng | 8 | Hwa Chong Institution |
| 27+0^0
7x2x(0!x0!) |
Yeo Si Heng | 8 | Hwa Chong Instituition |
| ( 2+0!+0!)(7) | Lim Aik Hwee | 9 | Hwa Chong Institution (High School Section) |
| 27+0!-0 | Cara Hudak | 8 | Hudson Montessori Middle Scholl |
| 20+7+0! | Lee Zi Jian | 8 | Hwa Chong Instituition |
| 20+7+0! | Lee Zi Jian | 8 | Hwa Chong Instituition |
| 20+7+0! | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 20+7+0! | Ng Xu Jie | 8 | Hwa Chong Institution |
| 20+7+0! | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 7*(2+0!+0!) | Song Cheng Jun | 7 | Hwa Chong Instituition |
| 7*(2+0!+0!) | Tan Song Kai | 8 | Hwa Chong Institution |
| (20+7)+(0!) | Olivia Kamensky | 8 | Brookstone School |
| 27-0+(0!) | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 20+7+0! | Delwin Koh | 8 | Hwa Chong Institution |
| (2!+0!+0!)*7 | Benjamin Low | 8 | Hwa Chong Institution |
| 7(2+0!+0!) | Kelley Mcintire | 9 | Brookstone |
| 27+0!+0 | Chris Mulroy | 7 | Rohrer Ms |
| 27+0!+0 | Jessica M | 7 | Mount Olive Middle School |
| 7x(2+0!+0!) | Margaret M. | 6 | Parker Middle School |
| 7x(2+0!+0!) | Ng Jun Da Nelson | 8 | Hwa Chong Instituition |
| (0!+0!+2!)*7 | Yuxiao Ning | 12 | Hoboken High School |
| 27+0^0 | Nigel Poh | 9 | Hwa Chong Institution |
| 27+0!+0 | Ow Zhen Quan | 8 | Hwa Chong Institution |
| 27+0!+0 | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 7*(2+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 | Nayan Shah | 8 | Hudson Montessori School |
| 0!-0+27 | Rachel Stewart | 7 | Mount Olive Middle School |
| 27+0^0 | Katie S | 6 | Parker Middle School |
| (2+0!+0!)x7 | Darren Toh | 9 | Hwa Chong Institution |
| 20+0!+7 | Ang Chong Wei | 9 | Hwa Chong Institution |
| (2+0!+0!)*7
20+0!+7 |
Chong Zhi Wei | 7 | Hwa Chong Insitution |
| 27+0!-0 | Tan Yi Wei | 7 | Hwa Chong Institution |
| 7*(2+0!+0!) | Andrew Weindel | 7 | Rorer M.S. |
| 27+0^0 | Abby W. | 6 | Parker Middle School |
| 20+0!+7 | Lim Jing Xi | 9 | Hwachong Institution (High School Section) |
| 27+0!+0 | Jerrold Au Ying Xian | 9 | Hwa Chong Institution |
| 20+0!+7 | 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 |
| [7x(2+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 |
| [2+(0!)+(0!)]*7 | 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 |
| 2x(0!+0!)x7 | Limjingxi | 9 | Hwachong Institution |
Please notify Judy Ann Brown of any errors.
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