Math Forum || K-12 Math Puzzles || Problems of the Week || Student Center

 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.

## STUDENT SOLUTIONS: 12

 Solution Name Grade School 7x2-0!-0! Kate Ahrens 7 Mount Olive Middle School (2+0)x(7-0!) Chua Cheng Aik 9 Hwa Chong Institution 7x2-0!-0! Neal Amos 10 Brookstone School 7x2-0!-0! Nick A 6 Parkermiddleschool 2x7-(0!+0!) Anton Baker 6 John-F-Kennedy School 20-7-0! Justen B 6 Parker Middle School (7-0^0)x2 Meghan B 6 Parker Middle School 7*2-0!-0! Bob Chen 8 Northwest Junior High 7*2-0!-0! Timothy Tay Kai Cheng 8 Hwa Chong Institution (7-0^0)x2 Calvin Sim Poh Chuan 12 Hwa Chong Institution (0!+0!)x7-2 David C 6 Parker Middle School 2(0-0!+7) 20-0!-7 Khu Boon Tat Daren 9 Hwa Chong Institution 7x2-((0!)+(0!)) Noah Delius 6 John F. Kennedy School, Berlin, Germany 7x2-0!-0! Tran Ha Duong 9 3h, Hwa Chong Institution 7x2-0!-0! Mae D 6 Parker Middle School 2*7-0!-0! Michael Endick 8 Foothill Middle School 7x2-(0!+0!) Sophie Farah 8 Hudson Montessori Middle School 20-7-0! Tim Freborg 7 Hudson Montessori (7-0^0)x2 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 20-0!-7 Wu Zi Hao 9 Hwachong Institution 2*(7 - (0^0)) Nicholas Heng 8 Hwa Chong Institution 7x2-0!-0! Yeo Si Heng 8 Hwa Chong Instituition 7*2-0!-0! Emily Himles 7 Rohrer Ms (20-7)-0! Angelina Hintze 6 John F. Kennedy School (2x7)-0!-0! Cara Hudak 8 Hudson Montessori Middle Scholl (7x2)-0!-0! Matt H 6 Parker Middle School 7*2-0!-0! Lee Zi Jian 8 Hwa Chong Instituion 7x2-0!-0! Sim Zhi Jian 8 Hwa Chong Instiution 20-7-0! Lau Wei Jie Jonathan 9 Hwa Chong Institution 20-7-0! Ng Xu Jie 8 Hwa Chong Institution (2+0!)!+7-0! Song Cheng Jun 7 Hwa Chong Instituition 20-7-0! Tan Song Kai 8 Hwa Chong Institution (2x7)- 0! - 0! Olivia Kamensky 8 Brookstone School 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 (2!+0!)!-0!+7 Benjamin Low 8 Hwa Chong Institution 2*(7-0^0) Amanda L. 6 Parker Middle School 7*2-(0!+0!) Kelley Mcintire 9 Brookstone 7*2-0!-0! Ella Medicus 8 Hudson Montessori School 7x2-0!-0! Connor M. 6 Parker 7*2-0!-0! Jessica M 7 Mount Olive Middle School 7x2-0!-0! Kelsey M 6 Parker Middle School 2x7-0!-0! Margaret 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 2*7-0!-0! Yuxiao Ning 12 Hoboken High School (2x7)-0!-0! Cam O 6 Parker Middle School 2*7-0!-0! Emily O 6 Parker Middle School (7-0^0)x2 Sio O 6 Parker Middle School 7*2-0!-0! Ryan Prince 7 Rohrer M.S. (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 7*2-0!-0! Glenn Goh Rongjie 9 Hwa Chong Insituition (7x2)-0!-0! Benjamin Lin Ruiyang 1 Hwa Chong Institution 7x2-0!-0! Caylie Scherba 8 Hudson Montessori Middle School 20 - 7 - 0! Nayan Shah 8 Hudson Montessori School 7*2-0!-0! Selena Starbard 7 Rohrer M.S. 20-0!-7 Darren Toh 9 Hwa Chong Institution 20- (7+0!) Henry Trimpe 1 Hudson Montessori School (7x2)-0!-0! Scott Tully 6 Parker Middle School 7x2-0!-0! Elizabeth Wargo 8 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 7*2-0!-0! Andrew Weindel 7 Rorer M.S. 20-7-0! Steven Winklosky 6 Christ The Divine Techer School 20-0!-7 Jerrold Au Ying Xian 9 Hwa Chong Institution ( 7 - 0^0 ) * 2 Foo Ren Xiang 3 Hwa Chong Institution -2+(0!+0!)*7 Han Xiaoxiao 9 Hwa Chong Institution 20-0!-7 Lim Han Xin 7 Hci -2+(0!+0!)x7 Shaun Lum Yu Xuan 3 Hwa Chong Institution (7x2)-0!-0! 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!)!-0!+7 Zou Xiang Yu 7 Hwa Chong Institution 7x2-(0!)-(0!) Xiao Yuting 8 Hwa Chong Institution 20-7-(0!) Ng Soon Zhou 7 Hwa Chong Institution Highschool (7-0!)*2+0 Yu Zhou 1 Hwa Chong Institution 20-7-0! Chrissa 6 John F. Kennedy School 20-0!-7 NergüL 10 ÖZel Fatih Sultan Lisesi 2(0-0!+7) Yuanxi 9 Hwa Chong Institution

Please notify Judy Ann Brown of any errors.