#### A Math Forum Project

Math Forum || Problems of the Week || Student Center

This Web page is intended to record solutions submitted by students in grades three through twelve. Student solutions were submitted January 1, 1999 through February 1,1999. Submissions for missing numbers can still be submitted using the Web form.

Rules: use the digits in the year 1999 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 51 to 60

 Solution Name Grade School 51 (1+9)x((sqrt9)!)-9 Wendy Cheung 10 The Bishop Strachan School 51 sqrt9(9+9-1) Cynthia Dady 8 St.Jude School, Brooklyn, NY 51 (sqrt9! *9)-(sqrt9*1) Michael Falls 6 Raymond Park Middle School 51 (-1)(sqrt9) + 9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 51 (sqrt9)! *9-(sqrt9)*1 Ms. Stonequist's Math Class 6 Marie Murphy School 52 [sqrt(9)! x9]-sqrt(9)+1 Jon Daley 7 Wilson Central Junior High, West Lawn, PA 52 (sqrt9! *9)-(sqrt9-1) Michael Falls 6 Raymond Park Middle School 52 (1 -sqrt9) + 9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 52 9[(sqrt9)!]-sqrt9+1 Artur Wawrzak 7 St.Jude School, Brooklyn, NY 52 (sqrt9)! *9-(sqrt9)+1 Ms. Stonequist's Math Class 6 Marie Murphy School 53 [sqrt(9) + sqrt(9)] x 9 - 1 Matt Agnew 7 Wilson Central Junior High, West Lawn, PA 53 (9+9)x(sqrt9)-1 Cynthia Dady 8 St.Jude School Brooklyn, NY 53 (9-sqrt9)x9-1 Tony Drake 6 Raymond Park Middle School 53 (sqrt9+sqrt9)*9-1 Michael Falls 6 Raymond Park Middle School 53 (-1) + (9)(sqrt9 +sqrt9) Lisa Gardner 3 Boyette Springs ES 53 ((sqrt 9+sqrt 9)x9)-1 Lisa Jackson 4 Cheat Lake Elementary 54 (9+9)xsqrt9x1 Cynthia Dorcely 8 St.Jude School, Brooklyn, NY 54 (9-sqrt9)x9x1 Tony Drake 6 Raymond Park Middle School 54 (sqrt9+sqrt9)*9*1 Michael Falls 6 Raymond Park Middle School 54 (1)(9)(9 - sqrt9) Lisa Gardner 3 Boyette Springs ES 54 ((sqrt 9 + sqrt 9)x9)x1 Lisa Jackson 4 Cheat Lake Elementary 54 [(9*1)-sqrt9]*9 Chris Waid 8 RFMS 54 (sqrt9)*(sqrt9)*(sqrt9)! *1 Ms. Stonequist's Math Class 6 Marie Murphy School 55 (9+9)xsqrt9+1 Cynthia Dorcely 8 St.Jude School, Brooklyn, NY 55 (9-sqrt9)x9+1 Tony Drake 6 Raymond Park Middle School 55 (sqrt9+sqrt9)*9+1 Michael Falls 6 Raymond Park Middle School 55 1 + (9)(sqrt9 + sqrt9) Lisa Gardner 3 Boyette Springs ES 55 ((sqrt 9 + sqrt 9)x9)+1 Lisa Jackson 4 Cheat Lake Elementary 55 (sqrt9)*(sqrt9)*(sqrt9)! +1 Ms. Stonequist's Math Class 6 Marie Murphy School 56 [sqrt(9)! x 9]+sqrt(9)-1 Matt Agnew 7 Wilson Central Junior High, West Lawn, PA 56 (sqrt9! *9)+(sqrt9-1) Michael Falls 6 Raymond Park Middle School 56 (-1) + (9)(sqrt9)! +sqrt9 Lisa Gardner 3 Boyette Springs ES 56 (9)(sqrt9)! +sqrt9-1 Niah Murray 8 St.Jude School, Brooklyn, NY 57 (1+9+9)*sqrt9 Jared Baker 8 Reading-Fleming Middle School 57 (sqrt9! *9)+(sqrt9*1) Michael Falls 6 Raymond Park Middle School 57 (1)(sqrt9) + 9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 57 (9)(sqrt9)! + sqrt9 x1 Niah Murray 8 St.Jude School, Brooklyn, NY 58 1+((sqrt9)!)x9)+(sqrt9) Wendy Cheung 10 The Bishop Strachan School 58 (sqrt9! *9)+(sqrt9+1) Michael Falls 6 Raymond Park Middle School 58 1 + sqrt9 + 9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 58 (9)(sqrt9)! +sqrt9+1 Niah Murray 8 St.Jude School, Brooklyn, NY 59 (sqrt9! *9)+(sqrt9!-1) Michael Falls 6 Raymond Park Middle School 59 (-1) + (sqrt9)! +9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 59 9[(sqrt9)!]+(sqrt9)!-1 Artur Wawrzak 7 St.Jude School, Brooklyn, NY 60 (sqrt9! *9)+(sqrt9! *1) Michael Falls 6 Raymond Park Middle School 60 (1)(sqrt9)! +9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 60 (9+1)x(sqrt 9 + sqrt 9) Lisa Jackson 4 Cheat Lake Elementary 60 9[(sqrt9)!]+(sqrt9)! x1 Theresa Mirarchi 7 St.Jude School, Brooklyn, NY

Please notify Judy Ann Brown of any errors.

The Math Forum ** Judy Ann Brown ** 22 December 1998