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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 |
| 20-0-7 | Chua Cheng Aik | 9 | Hwa Chong Institution |
| 20-7+0 | Neal Amos | 10 | Brookstone School |
| 2x7-0!-0 | Nick A | 6 | Parkermiddleschool |
| 20-7-0 | Morgan Batson | 9 | Brookstone School |
| 20-7+0 | Justen B | 6 | Parker Middle School |
| 7*2-0^0 | Brandon Cepas | 7 | Rohrer Ms |
| 7*2-0!-0 | Bob Chen | 8 | Northwest Junior High |
| 7*2-0!+0 | Timothy Tay Kai Cheng | 8 | Hwa Chong Institution |
| (7x2)-(0^0) | Calvin Sim Poh Chuan | 12 | Hwa Chong Institution |
| 20-7+0 | Hunter Ciuba | 8 | Brookstone |
| 20-7+0 | Amy C | 6 | Parker Middle School |
| 7x2-0^0 | David C | 6 | Parker Middle School |
| 20+0-7
.2x70-0! |
Khu Boon Tat Daren | 9 | Hwa Chong Institution |
| (7x2)+0-(0!) | Noah Delius | 6 | John F. Kennedy School, Berlin, Germany |
| 0-7+20 | Elena Diaz | 11 | Instituto Experimental De La Asuncin |
| 20-7+0 | Tran Ha Duong | 9 | 3h, Hwa Chong Institution |
| 2x7-0!+0 | David D | 6 | Parker Middle School |
| 7x2-0^0 | Mae D | 6 | Parker Middle School |
| (2+0!+0)!+7 | Michael Endick | 8 | Foothill Middle School |
| 20+0-7 | Lim Yu Sheng Fabian | 9 | Hwa Chong Institution |
| 20-7-0 | Tim Freborg | 7 | Hudson Montessori |
| 20-7+0 | Sam F | 6 | Parker Middle School |
| 7x2-0^0 | Zack F | 6 | Parker Middle School |
| 20+0-7 | Kam Mao Quan Gabriel | 7 | Hwa Chong Instituition |
| 20-7-0 | Chan Tuck Ging | 7 | Hwa Chong Institution |
| 2x7-0!+0 | Aly G. | 6 | Parker Middle Shcool |
| 7x2-0^0 | James G | 6 | Parker Middle School |
| 20-7.0 | Maggie G. | 6 | Parker Middle School |
| 20+0-7 | Wu Zi Hao | 9 | Hwachong Institution |
| 2(7) - (0^0) | Nicholas Heng | 8 | Hwa Chong Institution |
| 20-7-0 | Yeo Si Heng | 8 | Hwa Chong Instituition |
| 20-7+0 | Angelina Hintze | 6 | John F. Kennedy School |
| (2x7)-0!-0 | Cara Hudak | 8 | Hudson Montessori Middle Scholl |
| 20-0-7 | Lim Aik Hwee | 9 | Hwa Chong Institution (High School Section) |
| 7*2-0!-0 | Lee Zi Jian | 8 | Hwa Chong Instituion |
| 7x2-0^0 | Sim Zhi Jian | 8 | Hwa Chong Instiution |
| (7x2)-(0^0) | Chow Zheng Jie | 9 | Hwa Chong Institution |
| 20-7+0 | Ng Xu Jie | 8 | Hwa Chong Institution |
| 20-07 | Tan Wei Jie | 7 | Hwa Chong Institution |
| 20-7-0 | Lau Wei Jie Jonathan | 9 | Hwa Chong Institution |
| (2+0!)!+7+0 | Song Cheng Jun | 7 | Hwa Chong Instituition |
| 20-7+0 | Marcus Phoa Junxiong | 9 | Hwa Chong Institution (High School) |
| 20-7-0 | Tan Song Kai | 8 | Hwa Chong Institution |
| 7x2-(0!)-0 | Szeto Kah Keong | 8 | Hwa Chong Institution |
| 7*2-0!-0 | Delwin Koh | 8 | Hwa Chong Institution |
| 20-7-0 | Gannon Lavins | 7 | Hudson Montessori School |
| 20-7+0
7x2-(0!x0!) |
Won Cheng Yi Lewis | 9 | Hwa Chong Institution |
| 7*2-0!-0 | Alexa Lindsay | 7 | Rohrer Middle School |
| 20-0-7 | Benjamin Low | 8 | Hwa Chong Institution |
| 20-7+0 | Amanda L. | 6 | Parker Middle School |
| 7*2-0!+0 | Kelley Mcintire | 9 | Brookstone |
| 20-7-0 | Timothy Ng Yi Ming | 8 | Hwa Chong Institution |
| 20-7+0 | Chris Mulroy | 7 | Rohrer Ms |
| 20-7+0 | Connor M. | 6 | Parker |
| 7*2-0!-0 | Jessica M | 7 | Mount Olive Middle School |
| 2x7-0!+0 | Margaret M. | 6 | Parker Middle School |
| 7x2-0^0 | Monie M | 6 | Parker Middle School |
| 20-7.0 | Natalie M. | 6 | Parker Middle School |
| 20-7-0 | Olivia M | 6 | Parker Middle School |
| 7+(2+0!)!-0 | Ng Jun Da Nelson | 8 | Hwa Chong Instituition |
| 20-7+0 | Yuxiao Ning | 12 | Hoboken High School |
| 2x7-0^0 | Emily O | 6 | Parker Middle School |
| (7x2)-0^0 | Sio O | 6 | Parker Middle School |
| (0^0+2)! +7 | Jesse P | 6 | Parker Middle School |
| (2*7-0!)*0! | Ow Zhen Quan | 8 | Hwa Chong Institution |
| 7x2-0!-0 | Tang Zhuo Hao Ray | 7 | Hwa Chong Institution |
| 2x7-0!+0 | Adam Roenberg | 7 | Hudson Montessori School |
| 20+0-7 | Glenn Goh Rongjie | 9 | Hwa Chong Insituition |
| (7x2)-0!-0 | Benjamin Lin Ruiyang | 1 | Hwa Chong Institution |
| 2*7-0^0 | Brooke R | 6 | Parker Middle School |
| 7x2+0-0! | Caylie Scherba | 8 | Hudson Montessori Middle School |
| 20-7-0 | Nayan Shah | 8 | Hudson Montessori School |
| 20-7+0 | Ariela Stein | 11 | Model Secondary School For The Deaf |
| (7x2)-0^0 | Dylan S. | 6 | Parker Middle School |
| 7x2-0^0 | Katie S | 6 | Parker Middle School |
| 20 - 0 - 7 | Darren Toh | 9 | Hwa Chong Institution |
| 20-7+0 | Henry Trimpe | 1 | Hudson Montessori School |
| (2+0!)!-0+7 | Ang Chong Wei | 9 | Hwa Chong Institution |
| 20-0-7
(7*2)-0-0! |
Chong Zhi Wei | 7 | Hwa Chong Insitution |
| 7*2-0!-0 | Tan Yi Wei | 7 | Hwa Chong Institution |
| 20-7-0 | Steven Winklosky | 6 | Christ The Divine Techer School |
| (2+0!)!+0+7 | Han Xiaoxiao | 9 | Hwa Chong Institution |
| 20-0-7 | Lim Han Xin | 7 | Hci |
| 20-7+0 | Xiong Xingyu | 7 | Hwa Chong Institution |
| (2+0!)!+0+7 | Shaun Lum Yu Xuan | 3 | Hwa Chong Institution |
| 20+0-7 | Hshieh Chyi Yan | 7 | Hwa Chong Institution |
| 7*2-0!-0 | Chan Shen Yee | 4 | Hwa Chong Institution |
| (7x2)-(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 |
| (2+0!)!+7+0 | Zou Xiang Yu | 7 | Hwa Chong Institution |
| 7*2-(0!)-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 |
| 20-7-0 | Chrissa | 6 | John F. Kennedy School |
| 20-7.0 | Jared | 6 | Parker Middle School |
| 20-0-7 | NergüL | 10 | ÖZel Fatih Sultan Lisesi |
| 2[7-(0!)]+0! | Seth | 10 | Cphs |
| 2(-0!+7)+0! | Yuanxi | 9 | Hwa Chong Institution |
Please notify Judy Ann Brown of any errors.
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