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: 13

 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 Asuncin 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.