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: 14

 Solution Name Grade School (7x2+0)-0 Kate Ahrens 7 Mount Olive Middle School (2+0)x(0+7) Chua Cheng Aik 9 Hwa Chong Institution 0!+20-7 Neal Amos 10 Brookstone School (7x2+0)-0 (0!+2^0)x7 Max Yoong Pao Aun 7 Hwa Chong Institution 2x7+0+0 Janine A. 6 Parker Middle School 0+0+2x7 Marianne A 6 Parker Middle 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 (2+0+0)x7 Paxton Chia 8 Hwachong Institution 2x7+0+0 Hunter Ciuba 8 Brookstone (7x2)-0!x0 Calvin Sim Poh Chuan 12 Hwa Chong Institution (7*2)+0+0 Jackie Cuneo 7 Rohrer Ms 7x2+0+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 70x0.2 Noah Delius 6 John F. Kennedy School, Berlin, Germany 20-7+0! Tran Ha Duong 9 3h, Hwa Chong Institution 2x7+0+0 David D 6 Parker Middle School 7x2+0+0 Erica D 6 Parker Middle School (0x0)+2x7 Mae D 6 Parker Middle School 0+0+2*7 Michael Endick 8 Foothill Middle School (2+0)(0!x7) Lim Yu Sheng Fabian 9 Hwa Chong Institution 7x2-0-0 Tim Freborg 7 Hudson Montessori 7x2+0+0 Sam F 6 Parker Middle School (2+0+0)x7 Kam Mao Quan Gabriel 7 Hwa Chong Instituition 7x2+0+0 Chan Tuck Ging 7 Hwa Chong Institution 2x7+0+0 Aly G. 6 Parker Middle Shcool 7x2+0+0 Claudia G 6 Parker Middle School 7x2+0+0 James G 6 Parker Middle School 20x0.7 Maggie G. 6 Parker Middle School 2*(0+0+7) Wu Zi Hao 9 Hwachong Institution 2(7)+0+0 Nicholas Heng 8 Hwa Chong Institution 2x7+0+0 Yeo Si Heng 8 Hwa Chong Instituition (2x7)-0-0 Cara Hudak 8 Hudson Montessori Middle Scholl ( 2-0)(0!x7) Lim Aik Hwee 9 Hwa Chong Institution (High School Section) 2x7+0+0 Matt H 6 Parker Middle School (7x2)+0+0 Olivia 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 7x2+0-0 Chow Zheng Jie 9 Hwa Chong Institution 20-7+0! Ng Xu Jie 8 Hwa Chong Institution 07x02 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 7x2+0+0 Marcus Phoa Junxiong 9 Hwa Chong Institution (High School) 20-7+0! Tan Song Kai 8 Hwa Chong Institution [(7-0)+0]x2 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 7.0x2+0 Won Cheng Yi Lewis 9 Hwa Chong Institution (2+0+0)7 Benjamin Low 8 Hwa Chong Institution 2*7+0*0 Amanda L. 6 Parker Middle School 7*2+0+0 Ashley L 6 Parker Middle School 7x2+0+0 Luke Mansour 9 Brookstone School 20-7+0! William Mathews 6 John F. Kenedy School 2*7+0+0 Kelley Mcintire 9 Brookstone 7*2+0+0 Ella Medicus 8 Hudson Montessori School 7x2+0+0 Timothy Ng Yi Ming 8 Hwa Chong Institution 7x2+0+0 Brendan M. 6 Parker Middle School 2x7+0+0 Connor M. 6 Parker 7*2+0+0 Jessica M 7 Mount Olive Middle School 7x2+0+0 Monie M 6 W.S. Parker Middle School 2x7+0+0 Margaret M. 6 Parker Middle School 7x2+0+0 Natalie M. 6 Parker Middle School 7*2-0-0 Olivia M 6 Parker Middle School 7+(2+0!)!+0! Ng Jun Da Nelson 8 Hwa Chong Instituition 20*0.7 Yuxiao Ning 12 Hoboken High School (2x7)+0-0 Cam O 6 Parker Middle School (7x2)+(0+0) Sio O 6 Parker Middle School 7*2+0+0 Andy Chan Boon Pang 8 Hwa Chong Institution (0+7)(2!+0) William Prince 9 Christian High 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 2*7+0+0 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 7x2+0+0 Garrett Scherba 7 Hudson Montessori School (2x7)-0+0 Nayan Shah 8 Hudson Montessori School 0.7x20 Ang Wee Shuen 1 Hwa Chong Institution 7*2+0+0 Selena Starbard 7 Rohrer M.S. 2*7+0-0 Ariela Stein 11 Model Secondary School For The Deaf 7*2-0-0 Rachel Stewart 7 Mount Olive Middle School (7x2)-0-0 Dylan S. 6 Parker Middle School 7x2+0+0 Katie S 6 Parker Middle School 0.2*70 Chong Tjen-Yao 7 Hwa Chong Institution 20+0!-7 Sqrt(2+0!+0!)x7 Darren Toh 9 Hwa Chong Institution (2*7)-0-0 Ng Jian Tong 9 Hwa Chong Institution (7x2)+ 0+0 Henry Trimpe 1 Hudson Montessori School 2x7+0+0 Ang Chong Wei 9 Hwa Chong Institution (7*2)-0-0 Chong Zhi Wei 7 Hwa Chong Insitution 2x7+0+0 Kenneth Ng Yu Wei 7 Hwa Chong Institution 7*2-0-0 Tan Yi Wei 7 Hwa Chong Institution 7*2+0-0 Steven Winklosky 6 Christ The Divine Techer School 20*0.7 Foo Ren Xiang 3 Hwa Chong Institution (2+0!)!+0!+7 Han Xiaoxiao 9 Hwa Chong Institution 2x(0+0+7) Lim Han Xin 7 Hci 2x7+0+0 Xiong Xingyu 7 Hwa Chong Institution (2+0+0)x7 Shaun Lum Yu Xuan 3 Hwa Chong Institution (2+0+0)x7 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 2*(0+0+7) Low Kah Yi 9 Hwa Chong Institution 0+0+2x7 Zhou Yifan 3 Hwa Chong Institution 2x7+0+0 Johnny Yeung Chun Yin 7 Hwa Chong Institution (2+0!)!+7+0! Zou Xiang Yu 7 Hwa Chong Institution 7*2-0-0 Xiao Yuting 8 Hwa Chong Institution 2*7+0+0 Ng Soon Zhou 7 Hwa Chong Institution Highschool (2+0+0)*7 Yu Zhou 1 Hwa Chong Institution 2x7+0+0 Alicia Z. 6 Parker Middle School 7x2-0-0 Andre 8 St. Gabes 0+7x2-0 Chrissa 6 John F. Kennedy School (2+0!)!+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.