#### 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 31 to 40

 Solution Name Grade School 31 1 + [9 x sqrt(9)] + sqrt(9) Matt Agnew 7 Wilson Central Junior High, West Lawn, PA 31 (9xsqrt9)+sqrt9+1 David Auble 6 Raymond Park M.S. 31 (sqrt9x9)+1+sqrt9 Ashley Carter 6 Raymond Park Middle School 31 (sqrt9x9)+sqrt9+1 Tony Drake 6 Raymond Park Middle School 31 (9*sqrt9)+(sqrt9+1) Michael Falls 6 Raymond Park Middle School 31 1 + sqrt9 +(9*sqrt9) Lisa Gardner 3 Boyette Springs ES 31 9(sqrt9)+sqrt9+1 Nicholas Terracciano 8 St.Jude School, Brooklyn, NY 32 [sqrt(9)! x sqrt(9)!] - [sqrt(9) + 1] Matt Agnew 7 Wilson Central Junior High, West Lawn, PA 32 (-1) +(sqrt9)! + (9)(sqrt9) Lisa Gardner 3 Boyette Springs ES 32 sqrt9(9)+ (sqrt9)! -1 Jennifer Gauthier 8 St.Jude School, Brooklyn, NY 32 (sqrt9*9)+[(sqrt9)!-1] David Moudy 7 Raymond Park Middle School 33 (9+1)sqrt9+sqrt9 David Auble 6 Raymond Park M.S. 33 (-1 + 9)(sqrt9) + 9 Lisa Gardner 3 Boyette Springs ES 33 ( (9 + 1) x sqrt 9 ) + sqrt 9 Will Morrison 4 Cheat Lake Elementary 33 (sqrt9*9)+[(sqrt9)! * 1] David Moudy 7 Raymond Park Middle School 33 sqrt9(9+1)+sqrt9 Luis Urena 8 St.Jude School, Brooklyn, NY 34 [sqrt(9)! x sqrt(9)! ] - [sqrt(9) - 1] Christine Alaniz 7 Wilson Central Junior High, West Lawn, PA 34 (1 - sqrt9) +(sqrt9)! *(sqrt9)! Lisa Gardner 3 Boyette Springs ES 34 sqrt 9(9)+(sqrt9)! +1 Jennifer Gauthier 8 St.Jude School, Brooklyn, NY 34 (sqrt9*9)+[(sqrt9)! +1] David Moudy 7 Raymond Park Middle School 35 sqrt9x9+9-1 David Auble 6 Raymond Park M.S. 35 -1+9+9*sqr9 Jared Baker 8 Reading-Fleming Middle School 35 sqrt9x9+9-1 Tony Drake 6 Raymond Park Middle School 35 (sqrt9*9)+(9-1) Michael Falls 6 Raymond Park Middle School 35 sqrt9*9+9-1 Jeramey Franklin 6 Raymond Park Middle School 35 (-1) +9 + (9* sqrt9) Lisa Gardner 3 Boyette Springs ES 35 sqrt9x9-1+9 Sara Gobble 6 Raymond Park Middle School 35 (sqrt 9 x 9) + 9 - 1 Jessica Hammond 4 Cheat Lake Elementary 35 sqrt9x9+9-1 Luis Urena 8 St.Jude School, Brooklyn, NY 35 -1+9+(9*sqrt9) Chris Waid 8 RFMS 35 9 x sqrt(9) + 9 - 1 Karl Weist 7 Wilson Central Junior High, West Lawn, PA 36 sqrt9x9+9x1 Crystal Abel 8 St.Jude School, Brooklyn, NY 36 1(sqrt9x9)+9 David Auble 6 Raymond Park M.S. 36 1x(sqrt9)x((sqrt9)+9) Wendy Cheung 10 The Bishop Strachan School 36 sqrt9x9+9x1 Tony Drake 6 Raymond Park Middle School 36 (sqrt9*9) + (9*1) Michael Falls 6 Raymond Park Middle School 36 1*9 +(9*sqrt9) Lisa Gardner 3 Boyette Springs ES 36 ( ( sqrt 9 x 9 ) + 9 ) x 1 Jessica Hammond 4 Cheat Lake Elementary 37 sqrt9x9+9+1 Crystal Abel 8 St.Jude School, Brooklyn, NY 37 sqrt9x9+9+1 David Auble 6 Raymond Park M.S. 37 1+9+9*sqr9 Jared Baker 8 Reading-Fleming Middle School 37 sqrt9x9+9+1 Tony Drake 6 Raymond Park Middle School 37 (sqrt9*9) + (9+1) Michael Falls 6 Raymond Park Middle School 37 1 + 9 +(9*sqrt9) Lisa Gardner 3 Boyette Springs ES 37 sqrt9x9+9+1 Sara Gobble 6 Raymond Park Middle School 37 ((sqrt 9 x 9) + 9) + 1 Jessica Hammond 4 Cheat Lake Elementary 37 1+9+(9*sqrt9) Chris Waid 8 RFMS 38 [sqrt(9)! x sqrt(9)! ] + [sqrt(9) - 1] Matt Agnew 7 Wilson Central Junior High, West Lawn, PA 38 (sqrt9! *sqrt9! )+(sqrt9-1) Michael Falls 6 Raymond Park Middle School 38 (-1) +sqrt9 + (sqrt9)! (sqrt9)! Lisa Gardner 3 Boyette Springs ES 38 (sqrt9)! x (sqrt9)! + (sqrt9-1) Dominique Natoli 8 St.Jude School, Brooklyn, NY 38 (sqrt9)! *(sqrt9)+(sqrt9)-1 Ms. Stonequist's Math Class 6 Marie Murphy School 39 sqrt9(9+1)+9 David Auble 6 Raymond Park M.S. 39 (sqrt9! *sqrt9! )+(sqrt9*1) Michael Falls 6 Raymond Park Middle School 39 (1 +9)(sqrt9) +9 Lisa Gardner 3 Boyette Springs ES 39 ((9 + 1) x sqrt 9) + 9 Lisa Jackson 4 Cheat Lake Elementary 39 ((9 + 1) x sqrt 9) + 9 Will Morrison 4 Cheat Lake Elementary 39 sqrt9x(9+1)+9 Dominique Natoli 8 St.Jude School, Brooklyn, NY 40 (sqrt9! * sqrt9!) + (sqrt9+1) Michael Falls 6 Raymond Park Middle School 40 1 + sqrt9 +(sqrt9)! (sqrt9)! Lisa Gardner 3 Boyette Springs ES 40 (sqrt9)! x (sqrt9)! +sqrt9 +1 Noelle Ingrassia 8 St.Jude School, Brooklyn, NY

Please notify Judy Ann Brown of any errors.

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