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: 1

 Solution Name Grade School 2^0+0x7 Chua Cheng Aik 9 Hwa Chong Institution 2^7x0+0! Neal Amos 10 Brookstone School 7^0x2^0 Janine A 6 Parker Middle School 2-7^0+0 Khrysta A 6 Parker Middle School 7^0x2^0 Marianne A 6 Parker Middle School 7x0+2^0 Nick A 6 Parkermiddleschool (7*0)+2-0! Nicole A. 6 Parker Middle School 72*0+0! Abbie Basso 7 Rohrer Middle School (7*0)+2-0! Bryce S. Brown 7 William G Rohrer Middle School (2+7)*0+0! Matthew Butrica 7 Rohrer Middle School 7^0+2x0 Luke B 6 Parker Middle School 2.0-7^0 Meghan B 6 Parker Middle School 2-7^0+0 Spence B 6 Parker Middle School 7*0+2-0! Jamie Caputo 7 Rohrer Middle School (7+2)x0+0! Cory Cellucci 7 Rohrer Ms 207^0 Marissa Chamberlaim 4 China Primary School 2*7*0+0! Bob Chen 8 Northwest Junior High 7*0+2-0! Brandon Cepas 7 Rohrer Ms 2*0*7+0! Quan Chengzhang 3 Hwa Chong Institution 207^0 Calvin Sim Poh Chuan 12 Hwa Chong Institution (0*2)+(0*7)! Kelly Clark 7 Rohrer Middle School 207^0 Emily Cooer 9 Cadillac Senior High School 7*2*0+0! Eddie Cunningham 7 Rohrer Ms 2-7^0+0 Amy C 6 Parker Middle School 7x2x0+0! Billy C. 6 Parker Middle School 2-7^0+0 David C 6 Parker Middle School 2^0+7x0 Ryan C. 6 Parker Middle School 2-7^0+0 Troy C 7 Parker Middle School (7x0)+(2-0!) Kevin D'amico 7 Rohrer Middle School 2^0+0x7 7^0+(2x0) 207^0 72x0+0! Khu Boon Tat Daren 9 Hwa Chong Institution (7x(2x0))+(0!) Noah Delius 6 John F. Kennedy School, Berlin, Germany 0!+(2*0*7) Kathleen Duffy 7 Rohrer Middle School 2-7^0+0 Tran Ha Duong 9 3h, Hwa Chong Institution 0!x(7x2x0) David D 6 Parker Middle School 2-7^0+0 Erica D 6 Parker Middle School (2x0)^(7x0) Julia D. 6 Parker Middle School 7-(0!+2)!+0 Michael Endick 8 Foothill Middle School ((((2!+0!)!+0!)!)/7!)! John Euchler 12 Mccann Technical School 2-0!+(0x7) Lim Yu Sheng Fabian 9 Hwa Chong Institution (7*0)+(2-0!) Mark Frasco 7 Rohrer Ms (2+7+0)^0 Tim Freborg 7 Hudson Montessori 720^0 Amanda Fry 7 Rohrer Ms (7^2)^0 +0 Nicholas F. 6 Parker Middle School 2^0+0x7 Kam Mao Quan Gabriel 7 Hwa Chong Institution 207^0 Chan Tuck Ging 7 Hwa Chong Institution 2+(0*7)-0! Molly Grasmick 7 Rohrer Ms (7x2)x0+(0!) Aly G. 6 Parker Middle School 7^0x2^0 Claudia G 6 Parker Middle School 2^0+0^7 J.D. G 6 Parker Middle School 2^0+7x0 James G 6 Parker Middle School 2^0x7^0 Maggie G. 6 Parker Middle School 2^0+0x7 Wu Zi Hao 9 Hwachong Institution 2-(7^0)-0 Nicholas Heng 8 Hwa Chong Institution (7+2+0)^0 Yeo Si Heng 8 Hwa Chong Instituition 0!+0*2*7 Dong Huang 11 St.Clares 7^0x2^0 Cara Hudak 8 Hudson Montessori Middle Scholl 2^0-0 (7) Lim Aik Hwee 9 Hwa Chong Institution (High School Section) (7^0)+(2x0) Jared H 6 Parker Middle School (2^0)+(0x7) Melissa H 6 Parker Middle School 7^0+ 0^2 Olivia H 6 Parker Middle School 2*0+7^0 Peter H 6 Parker Middle School (0*7)+2-0! Lee Zi Jian 8 Hwa Chong Instituition 0*7+2-0! Sim Zhi Jian 8 Hwa Chong Instituition (7+2+0)^0 Chow Zheng Jie 9 Hwa Chong Institution (0*7)+2-0! 720^0 Ng Xu Jie 8 Hwa Chong Instituition 207^0 Lau Wei Jie Jonathan 9 Hwa Chong Institution Sqrt(2^0+0*7) Christopher Ho Junhong 9 Hwa Chong Institution 720^0 Marcus Phoa Junxiong 9 Hwa Chong Institution (High School) 2^0x7^0 Tan Song Kai 8 Hwa Chong Institution (7-2)x0+0! Olivia Kamensky 8 Brookstone School (7*0)+(2-0!) Kevin Kasilowski 7 Rohrer Ms 2^0x7^0 Rickey Kenneybrew 10 Model Secondary School For The Deaf (0!)+(7x2x0) Szeto Kah Keong 8 Hwa Chong Institution (0*7)+2-0! (7-0!-0!)*.2 Delwin Koh 8 Hwa Chong Institution 0!+7.2x0 Geena K. 6 Parker Middle School (2x7x0)+0! Zac K 6 Parker Middle Shcool 0!+(7x2x0) Sean Lai 8 Hwa Chong Institution (2*0)+(0*7)! Chris Langum 7 Rohrer Ms 2-0!+0^7 Gannon Lavins 7 Hudson Montessori School (0/7)+2-(0!) 7!x0+2!-0! 0x(7/2)+0! (7+2)*0+0! Won Cheng Yi Lewis 9 Hwa Chong Institution (7*0)+2-0! Alexa Lindsay 7 Rohrer Middle School 2^0+0*7 Benjamin Low 8 Hwa Chong Institution (7-2)^0+0 Amanda L. 6 Parker Middle School 7^0/2^0 Ashley L 6 Parker Middle School 27x0+0! David Markey 7 Mt.Olive Middle School 207^0 Hannah Marshall 7 M.O.M.S. 72x0+0! William Mathews 6 John F. Kenedy School (7x2)x0+0! Sammy Mayall 6 Viewpoint (0*7)+(2-0!) Tori Mcerlean 7 Rohrer Middle School 0!+[(7-2)0] Kelley Mcintire 9 Brookstone (7*0)+(2-0!) Robert Mounce 7 Rohrer Ms 0!+7.2x0 Ankit M 6 Parker Middle School (7^0)+2x0 Brendan M. 6 Parker Middle School 0!+(7x2x0) Connor M. 6 Parker (7x0)+(2^0) Johnathan M 6 Parker Middle School 27^0.0 Kevin M 6 Parker Middle School (2+7)*0+0! Margaret M. 6 Parker Middle School 7^0x2^0 Monie M 6 Parker Middle School 2^0x7^0 Natalie M. 6 Parker Middle School 7*0+2^0 Olivia M 6 Parker Middle School (70+2)^0 Ng Jun Da Nelson 8 Hwa Chong Instituition (2^0)+(7x0) Brendan N 6 Parker Middle School 2^0x7^0 Cam O 6 Parker Middle School (0*7)+2-0! Andy Chan Boon Pang 8 Hwa Chong Institution 702^0 Robert Parisi 7 Mount Olive Middle School (2^0)(7^0) Anthony Perry 10 Model Secondary School For The Deaf (72*0)+0! Mary Kate Pierson 7 Rohrer Middle School 72*0+0! Ryan Prince 7 Rohrer M.S. 2^0+0x7 Tang Zhuo Hao Ray 7 Hwa Chong Institution 72*0+0! Shane Reilly 7 Roher M.S. 2-7^0-0 Adam Roenberg 7 Hudson Montessori School 7*2*0+0! Glenn Goh Rongjie 9 Hwa Chong Insituition (7^0)x(2^0) Benjamin Lin Ruiyang 8 Hwa Chong Institution 0!+(2*0*7) Brandi Rusk 7 Rohrer Middle School 27^0+0 Brooke R 6 Parker Middle School 0!+0*2*7 Victoria R. 6 Parker Middle School 2-7^0+0 Caylie Scherba 8 Hudson Montessori Middle School (7*0)+(2-0!) Kassidy Schmidt 7 Rohrer Middle School 2-0-7^0 Nayan Shah 8 Hudson Montessori School (207)^0 Rachel Stewart 7 Mount Olive Middle School 7*0+2^0 Alexa Surmick 7 Rohrer Middle School 2^(0x0x7) Ethan Swan 8 Christ The Divine Teacher School (0x7)+2^0 Dylan S. 6 Parker Middle School 2-7^0+0 Katie S 6 Parker Middle School 0!+(2x7)x0 Kevin .S 6 Parker Middle School 2-7^0+0 Meghan S 6 Parker Middle School 27^0+0 Nicki S 6 Parker Middle School 2-7^0-0 Jon Tan 8 Hwachong Institution (7-0!)!/[(2+0!)!]! Chong Tjen-Yao 7 Hwa Chong Institution 2^0+0x7 Darren Toh 9 Hwa Chong Institution 207^0 Ng Jian Tong 9 Hwa Chong Institution 7^0 + (0x2) Henry Trimpe 7 Hudson Montessori School 2^0+(7x0) Anna T. 6 Parker Middle School (7-2)*0+0! Sarah T 6 Parker Middle School 2^0x7^0 Natalie V. 6 Parker Middle School (2*0*7)+0! Megan Walter 7 Rohrer Ms 2^0+0x7 Ang Chong Wei 9 Hwa Chong Institution 2^0+(0*7) Chong Zhi Wei 7 Hwa Chong Insitution 207^0 Tan Yi Wei 7 Hwa Chong Institution 2x7x0+0! Maung Thet Naing Win 7 Hwa Chong Institution 720^0 Leah W. 6 Parker Middle 2^0+0x7 Jerrold Au Ying Xian 9 Hwa Chong Institution 2^0+0*7 Han Xiaoxiao 9 Hwa Chong Institution 2-7^(0*0) Li Xichen 1 Hwa Chong Institution 2^0+(0*7) Lim Han Xin 7 Hci 2^0+0x7 Shaun Lum Yu Xuan 3 Hwa Chong Institution 2^0+0x7 (7-2-0)^0 Hshieh Chyi Yan 7 Hwa Chong Institution 2^0+0x7 Loh Jun Yan 3 Hwa Chong Institution (High School Section) (7^0)+(0x2) Lee Jun Yi 8 Hwa Chong Institution 2^0+0*7 Low Kah Yi 9 Hwa Chong Institution 7^0+0x2 Zhou Yifan 3 Hwa Chong Institution 2^0+0*7 Tan Zher Yin 7 Hci 2^0+(0x7) Zou Xiang Yu 7 Hwa Chong Institution (0!)+(0x2x7) Xiao Yuting 8 Hwa Chong Institution 2^0+(0*7) Ng Soon Zhou 7 Hwa Chong Institution Highschool 2*0+7^0 Yu Zhou 1 Hwa Chong Institution 2^0+0*7 Chen Zijin 9 Hwa Chong Institution,Singapore 27^0+0 Alicia Z. 6 Parker Middle School 27^0-0 Andre 8 St. Gabes 27x0+0! Chrissa 6 John F. Kennedy School (7x0)+2^0 Hannah 6 Parker Middle School (2+7)0+0! Katie 8 St. Gabriel 2-0!+0x7 Yuanxi 9 Hwa Chong Institution

Please notify Judy Ann Brown of any errors.