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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+0x7 | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 20+(0x7) | Neal Amos | 10 | Brookstone School |
| 20-(7x0) | Max Yoong Pao Aun | 7 | Hwa Chong Institution |
| 7*(2+0!)-0! | Matthew Butrica | 7 | Rohrer Middle School |
| 20-7*0 | Bob Chen | 8 | Northwest Junior High |
| 20+(0*7) | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| 7*0+20
20+0^7 |
Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| 7x(2+0!)-0! | Amy C | 6 | Parker Middle School |
| 7x0+20 | Billy C. | 6 | Parker Middle School |
| 20+(0x7) | Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| 20+0^7 | Tran Ha Duong | 9 | 3h, Hwa Chong Institution |
| (7x0)+20 | Erica D | 6 | Parker Middle School |
| (0!+2)*7-0! | Michael Endick | 8 | Foothill Middle School |
| (7*0)+20 | Timothy Esposito | 7 | Rohrer Middle School |
| 7(2+0!)-0! | Sophie Farah | 8 | Hudson Montessori Middle School |
| 20+0x7 | Tim Freborg | 7 | Hudson Montessori |
| 7+0+20 | Sam F | 6 | Parker Middle School |
| 20+(0x7) | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 20-7x0 | Chan Tuck Ging | 7 | Hwa Chong Institution |
| 20+(0*7) | Molly Grasmick | 7 | Rohrer Ms |
| 20+(7x0) | Maggie G. | 6 | Parker Middle School |
| 20+0*7 | Wu Zi Hao | 9 | Hwachong Institution |
| 20-7(0) | Nicholas Heng | 8 | Hwa Chong Institution |
| 20x7^0 | Cara Hudak | 8 | Hudson Montessori Middle Scholl |
| 20+0x7 | Lim Aik Hwee | 9 | Hwa Chong Institution (High School Section) |
| 20+(0x7) | Matt H | 6 | Parker Middle School |
| 0*7+20 | Anthony Illiano | 7 | Rohrer M.S. |
| 20+(7*0) | Karen Israel | 7 | Roher Ms |
| 20-(7*0) | Lee Zi Jian | 8 | Hwa Chong Instituion |
| 20+(0x7) | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| 20+0(7) | Chow Zheng Jie | 9 | Hwa Chong Institution |
| 20+(0*7) | Ng Xu Jie | 8 | Hwa Chong Institution |
| 7*(2+0!)-0! | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| 20*7^0 | Tan Song Kai | 8 | Hwa Chong Institution |
| 20+(0*7) | Tim Kenna | 7 | Rohrer Middle School |
| 20-(0x7) | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 20+(0*7) | Delwin Koh | 8 | Hwa Chong Institution |
| 20-0^7 | Gannon Lavins | 7 | Hudson Montessori School |
| 20+0*7 | Benjamin Low | 8 | Hwa Chong Institution |
| 20+(7x0) | Luke Mansour | 9 | Brookstone School |
| 20+(0x7) | William Mathews | 6 | John F. Kenedy School |
| 20+(7*0) | Kelley Mcintire | 9 | Brookstone |
| 7*(2+0!)-0! | Ella Medicus | 8 | Hudson Montessori School |
| 20+0^7 | Nina Mielcarz | 7 | Rohrer Middle School |
| 20-(7x0) | Connor M. | 6 | Parker |
| 7(2+0!)-0! | Jessica M | 7 | Mount Olive Middle School |
| 7x0+20 | Margaret M. | 6 | Parker Middle School |
| 20+7x0 | Natalie M. | 6 | Parker Middle School |
| 20+7*0 | Yuxiao Ning | 12 | Hoboken High School |
| 7*(0!+2)-0! | Zack O'connell | 7 | Rohrer Ms |
| 7x(2+0!)-0! | Cam O | 6 | Parker Middle School |
| 20+(7x0) | Jesse P | 6 | Parker Middle School |
| 7*(2+0!)-0! | Ow Zhen Quan | 8 | Hwa Chong Institution |
| 20+(0x7) | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| (20)+(7x0) | Adam Roenberg | 7 | Hudson Montessori School |
| 7*(2+0!)-0! | Glenn Goh Rongjie | 9 | Hwa Chong Insituition |
| (7x(0!+2))-0! | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 20+(0x7) | Caylie Scherba | 8 | Hudson Montessori Middle School |
| (20)+(7*0) | Kassidy Schmidt | 1 | Rohrer Ms |
| 20-(7x0) | Nayan Shah | 8 | Hudson Montessori School |
| 7x0+20 | Bobby S | 6 | Parker Middle School |
| 20 + (0x7) | Henry Trimpe | 1 | Hudson Montessori School |
| 20+0x7 | Darren Toh | 9 | Hwa Chong Institution |
| 20+0x7 | Ang Chong Wei | 9 | Hwa Chong Institution |
| 20+(0*7) | Chong Zhi Wei | 7 | Hwa Chong Insitution |
| 7*(2+0!)-0! | Tan Yi Wei | 7 | Hwa Chong Institution |
| [7*(2+0!)]-0! | Andrew Weindel | 7 | Rorer M.S. |
| 20+(0x7) | Lim Han Xin | 7 | Hci |
| 20+(0x7) | Shaun Lum Yu Xuan | 3 | Hwa Chong Institution |
| 20+(0x7) | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| 20+0*7 | Chan Shen Yee | 4 | Hwa Chong Institution |
| 20x7^0 | Lee Jun Yi | 8 | Hwa Chong Institution |
| 20+0*7 | Low Kah Yi | 9 | Hwa Chong Institution |
| 20+0x7 | Zhou Yifan | 3 | Hwa Chong Institution |
| 20+(0x7) | Zou Xiang Yu | 7 | Hwa Chong Institution |
| [2+(0!)]*7-(0!) | Xiao Yuting | 8 | Hwa Chong Institution |
| 20+(0*7) | Ng Soon Zhou | 7 | Hwa Chong Institution Highschool |
| 20+0*7 | Yu Zhou | 1 | Hwa Chong Institution |
| 0x7+20 | Chrissa | 6 | John F. Kennedy School |
| 20+0^7 | Jared | 6 | Parker Middle School |
| 20-0*7 | NergüL | 10 | ÖZel Fatih Sultan Lisesi |
| 20+0x7 | Yuanxi | 9 | Hwa Chong Institution |
Please notify Judy Ann Brown of any errors.
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