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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 |
| -2-0+Sqrt(0!+7!) | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 70-2+0! | Neal Amos | 10 | Brookstone School |
| 70-2+0! | Paulina Baumann | 7 | Rohrer Middle School |
| 70-2+0! | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| -2-0+Sqrt(0!+7!)
70-(0x2)! |
Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| 70-2+0! | Michael Endick | 8 | Foothill Middle School |
| (70-2)+0! | Mark Frasco | 7 | Rohrer Ms |
| 70-2^0 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 70-2^0 | Chan Tuck Ging | 7 | Hwa Chong Institution |
| -2+Sqrt(0!+0+7!) | Wu Zi Hao | 9 | Hwachong Institution |
| 70-2+0! | Nicholas Heng | 8 | Hwa Chong Institution |
| 70-2^0 | Yeo Si Heng | 8 | Hwa Chong Instituition |
| 70-(2^0) | Dong Huang | 11 | St.Clares |
| 70-2+0! | Matt H | 6 | Parker Middle School |
| 70-2+0! | Lee Zi Jian | 8 | Hwa Chong Instituition |
| 70-(2^0) | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 70-2+0! | Ng Xu Jie | 8 | Hwa Chong Institution |
| 70-2+0! | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 70-2+0! | Tan Song Kai | 8 | Hwa Chong Institution |
| 70-2+0! | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 70-(2^0) | Delwin Koh | 8 | Hwa Chong Institution |
| -2-0+(Sqrt(0!+7!)) | Benjamin Low | 8 | Hwa Chong Institution |
| 70-(2-0!) | Hannah Marshall | 7 | M.O.M.S. |
| 70-2+0! | Chris Mulroy | 7 | Rohrer Ms |
| 70-2+0! | Jessica M | 7 | Mount Olive Middle School |
| 70-2+0! | Ng Jun Da Nelson | 8 | Hwa Chong Instituition |
| 70-2+0! | Yuxiao Ning | 12 | Hoboken High School |
| 70-2+0! | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 70-2+0! | Erick Rodgers | 7 | Rohrer Ms |
| 70-2^0 | Glenn Goh Rongjie | 9 | Hwa Chong Instituition |
| 70-2+0! | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 70-2+0! | Brandi Rusk | 7 | Rohrer Middle School |
| 70-2+0! | Rachael Samaroo | 7 | Rohrer Middle School |
| 70-2^0 | Caylie Scherba | 8 | Hudson Montessori Middle School |
| (70-2)+0! | Kassidy Schmidt | 1 | Rohrer Ms |
| 70-2+0! | Alivia Spinozzi | 7 | Rorher Middle School |
| 70-2+0! | Selena Starbard | 7 | Rohrer M.S. |
| 70-(2-0!) | Katie S | 6 | Parker Middle School |
| 70-2^0 | Ang Chong Wei | 9 | Hwa Chong Institution |
| 70-2^0 | Tan Yi Wei | 7 | Hwa Chong Institution |
| 70-2^0 | Lim Han Xin | 7 | Hci |
| 70-2^0 | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| 70+0!-2 | Lee Jun Yi | 8 | Hwa Chong Institution |
| -2+Sqrt(0!+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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