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: 70

 Solution Name Grade School -2+0!+Sqrt(0!+7!) Chua Cheng Aik 9 Hwa Chong Institution 70+(0x2) Max Yoong Pao Aun 7 Hwa Chong Institution 72-0!-0! Neal Amos 10 Brookstone School 72-0!-0! Gina Bossi 7 Rohrer Middle School 70+2*0 Bob Chen 8 Northwest Junior High 72-0!-0! Timothy Tay Kai Cheng 8 Hwa Chong Institution 0*2+70 Eddie Cunningham 7 Rohrer MS -2+0!+Sqrt(0!+7!) Khu Boon Tat Daren 9 Hwa Chong Institution 7*((0!+0!)/.2) Michael Endick 8 Foothill Middle School 70+(2(0)) Tim Freborg 7 Hudson Montessori 70+2x0 Kam Mao Quan Gabriel 7 Hwa Chong Instituition 70-2x0 Chan Tuck Ging 7 Hwa Chong Institution -2^0+Sqrt(0!+7!) Wu Zi Hao 9 Hwachong Institution 72-0!-0! Jan Eric Hellenbrand 6 John-.F.-Kennedy 70-2(0) Nicholas Heng 8 Hwa Chong Institution 72-0!-0! Yeo Si Heng 8 Hwa Chong Instituition 70+0x2 Lim Aik Hwee 9 Hwa Chong Institution (High School Section) 70+(2*0) Anthony Illiano 7 Rohrer M.S. 72-0!-0! Lee Zi Jian 8 Hwa Chong Instituition 72-0!-0! Sim Zhi Jian 8 Hwa Chong Instiution 72-0!-0! Ng Xu Jie 8 Hwa Chong Institution 72-0!-0! Lau Wei Jie Jonathan 9 Hwa Chong Institution 72-0!-0! Olivia Kamensky 8 Brookstone School 70+(2x0) Szeto Kah Keong 8 Hwa Chong Institution 72-0!-0! Delwin Koh 8 Hwa Chong Institution 72-0!-0! Won Cheng Yi Lewis 9 Hwa Chong Institution -(2^0)+(Sqrt(0!+7!)) Benjamin Low 8 Hwa Chong Institution 70+(2x0) Luke Mansour 9 Brookstone School 70+0*2 Hannah Marshall 7 M.O.M.S. 70+(0*2) Kelley Mcintire 9 Brookstone 72-0!-0! Timothy Ng Yi Ming 8 Hwa Chong Institution 72-0!-0! Jessica M 7 Mount Olive Middle School 70+2*0 Yuxiao Ning 12 Hoboken High School 72-0!-0! Cam O 6 Parker Middle Shcool 72-0!-0! Janey Perry 7 Rohrer MS 72-(0!+0!) Mary Kate Pierson 7 Rohrer Middle School 70+(2x0) Jesse P 6 Parker Middle School (7/.2)*(0!+0!) Ow Zhen Quan 8 Hwa Chong Institution 70+(2x0) Tang Zhuo Hao Ray 7 Hwa Chong Institution 72-(0!+0!) Erick Rodgers 7 Rohrer MS 70+2*0 Glenn Goh Rongjie 9 Hwa Chong Instituition 72-0!-0! Benjamin Lin Ruiyang 1 Hwa Chong Institution 2x0+70 Caylie Scherba 8 Hudson Montessori Middle School 70+(2*0) Selena Starbard 7 Rohrer M.S. 72-0!-0! Rachel Stewart 7 Mount Olive Middle School 70+0^2 Katie S 6 Parker Middle School 72-0!-0! Elizabeth Wargo 8 Hudson Montessori School 2x0+70 Ang Chong Wei 9 Hwa Chong Institution 72-0!-0! Chong Zhi Wei 7 Hwachong 70-2*0 Tan Yi Wei 7 Hwa Chong Institution 72-0!-0! Jerrold Au Ying Xian 9 Hwa Chong Institution 70-(2x0) Lim Han Xin 7 Hci 72-(0!+0!) Lee Jun Yi 8 Hwa Chong Institution -2^0+Sqrt(0!+7!) Low Kah Yi 9 Hwa Chong Institution 70-2x0 Zhou Yifan 3 Hwa Chong Institution 70+0x2 Zou Xiang Yu 7 Hwa Chong Institution 70+(2x0) Xiao Yuting 8 Hwa Chong Institution 70+(2*0) Ng Soon Zhou 7 Hwa Chong Institution Highschool 70+0*2 Yu Zhou 1 Hwa Chong Institution 0x2+70 Chrissa 6 John F. Kennedy School

Please notify Judy Ann Brown of any errors.