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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 |
| 70+2-0! | Kate Ahrens | 7 | Mount Olive Middle School |
| (2x0)+Sqrt(0!+7!) | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 72-0!-0 | Neal Amos | 10 | Brookstone School |
| 70+2-0! | Bob Chen | 8 | Northwest Junior High |
| 72-0!-0 | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| 2^0+70 | Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| (2x0)+Sqrt(0!+7!)
Sqrt((2x0)+0!+7!) |
Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| Sqrt(7!+0!)+(2*0) | Michael Endick | 8 | Foothill Middle School |
| 2^0+70 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 70+2^0 | Chan Tuck Ging | 7 | Hwa Chong Institution |
| Sqrt(2^0+0+7!) | Chew Hanson | 7 | Hwa Chong Institution(High School) |
| Sqrt(20^0+7!) | Wu Zi Hao | 9 | Hwachong Institution |
| 72-0!-0 | Jan Eric Hellenbrand | 6 | John-.F.-Kennedy |
| 70+2-0! | Nicholas Heng | 8 | Hwa Chong Institution |
| 70+2^0 | Yeo Si Heng | 8 | Hwa Chong Instituition |
| 70+2-0! | Lim Aik Hwee | 9 | Hwa Chong Institution (High School Section) |
| 72-0!+0 | Matt H | 6 | Parker Middle School |
| 70+2-0! | Anthony Illiano | 7 | Rohrer M.S. |
| 72-0!-0 | Lee Zi Jian | 8 | Hwa Chong Instituition |
| 72-0!-0 | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 70+(2^0) | Chow Zheng Jie | 9 | Hwa Chong Institution |
| 72-0!-0 | Ng Xu Jie | 8 | Hwa Chong Institution |
| 72-0-0! | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 72-0!+0 | Olivia Kamensky | 8 | Brookstone School |
| 70+2-0! | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 72-0-0! | Delwin Koh | 8 | Hwa Chong Institution |
| 72-0^0 | Won Cheng Yi Lewis | 9 | Hwa Chong Institution |
| 2*0+(Sqrt(0!+7!)) | Benjamin Low | 8 | Hwa Chong Institution |
| 70+2-0! | Hannah Marshall | 7 | M.O.M.S. |
| 72+0-0! | William Mathews | 6 | John F. Kenedy School |
| 72-0!-0 | Timothy Ng Yi Ming | 8 | Hwa Chong Institution |
| 72-0!-0 | Jessica M | 7 | Mount Olive Middle School |
| 72-0!+0 | Natalie M. | 6 | Parker Middle School |
| 70+2^0 | Yuxiao Ning | 12 | Hoboken High School |
| 72-0!+0 | Cam O | 6 | Parker Middle Shcool |
| 72-0^0 | Siobhan O's | 6 | Parker Middle School |
| 72-(0!+0) | Mary Kate Pierson | 7 | Rohrer Middle School |
| 70+2^0 | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 70+(2-0!) | Shane Reilly | 7 | Roher M.S. |
| 70+2^0 | Glenn Goh Rongjie | 9 | Hwa Chong Instituition |
| 72-0!-0 | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 70+2^0 | Caylie Scherba | 8 | Hudson Montessori Middle School |
| 72-0!+0 | Selena Starbard | 7 | Rohrer M.S. |
| 72-0!-0 | Rachel Stewart | 7 | Mount Olive Middle School |
| 72-0!+0 | Sandra Syhalath | 7 | Rohrer M.S. |
| 72-0^0 | Katie S | 6 | Parker Middle School |
| 72-0!-0 | Chong Tjen-Yao | 7 | Hwa Chong Institution |
| 2^0+70 | Ang Chong Wei | 8 | Hwa Chong Institution |
| 72+0-0! | Chong Zhi Wei | 7 | Hwachong |
| 70+2-0! | Tan Yi Wei | 7 | Hwa Chong Institution |
| Sqrt(2^0+0+7!) | Lim Han Xin | 7 | HCI |
| 2^0+70 | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| Sqrt(7!+0+2^0) | Chan Shen Yee | 12 | Hwa Chong Institution |
| 70-0!+2 | Lee Jun Yi | 8 | Hwa Chong Institution |
| Sqrt(20^0+7!) | Low Kah Yi | 9 | Hwa Chong Institution |
| 70+2-0! | Zhou Yifan | 3 | Hwa Chong Institution |
| 70+2^0 | Zou Xiang Yu | 7 | Hwa Chong Institution |
| 70+2-(0!) | Xiao Yuting | 8 | Hwa Chong Institution |
| 70+[2-(0!)] | Ng Soon Zhou | 7 | Hwa Chong Institution Highschool |
| 70+2^0 | Yu Zhou | 1 | Hwa Chong Institution |
| 70+2-0! | Chrissa | 6 | John F. Kennedy School |
Please notify Judy Ann Brown of any errors.
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