#### 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 41 to 50

 Solution Name Grade School 41 [sqrt(9)! x sqrt(9)! ] + [sqrt(9)! - 1] Christine Alaniz 7 Wilson Central Junior High, West Lawn, PA 41 1+((sqrt9)! )!/(9+9) Wendy Cheung 10 The Bishop Strachan School 41 (sqrt9! * sqrt9!)+(sqrt9! -1) Michael Falls 6 Raymond Park Middle School 41 (-1 +(sqrt9)! ) +(sqrt9)!(sqrt9)! Lisa Gardner 3 Boyette Springs ES 41 (sqrt9)! x (sqrt9)! +(sqrt9)! -1 Noelle Ingrassia 8 St.Jude School,Brooklyn, NY 42 (sqrt9! * sqrt9! ) + (sqrt9! * 1) Michael Falls 6 Raymond Park Middle School 42 (1)(sqrt9)!(sqrt9)! + (sqrt9)! Lisa Gardner 3 Boyette Springs ES 42 (sqrt9)! x(sqrt9)! +(sqrt9)! x1 Noelle Ingrassia 8 St.Jude School, Brooklyn, NY 43 1+(sqrt9)! +((sqrt9)! )x((sqrt9)! ) Wendy Cheung 10 The Bishop Strachan School 43 (sqrt9! *sqrt9! )+(sqrt9! +1) Michael Falls 6 Raymond Park Middle School 43 1 +(sqrt9)!(sqrt9)! +(sqrt9)! Lisa Gardner 3 Boyette Springs ES 43 (sqrt9)! x(sqrt9)! +(sqrt9)! +1 Noelle Ingrassia 8 St.Jude School, Brooklyn, NY 44 (sqrt9! *9)-(9+1) Michael Falls 6 Raymond Park Middle School 44 (-1) +9 + (sqrt9)! (sqrt9)! Lisa Gardner 3 Boyette Springs ES 44 sqrt9[9+(sqrt9)! ]-1 Kathleen Paul 8 St.Jude School, Brooklyn, NY 45 [sqrt(9) + sqrt(9) - 1] x 9 Christine Alaniz 7 Wilson Central Junior High, West Lawn, PA 45 (sqrt9! * sqrt9! )+(9*1) Michael Falls 6 Raymond Park Middle School 45 (sqrt9! * 9)-(9*1) Michael Falls 6 Raymond Park Middle School 45 (1*9) +(sqrt9)!(sqrt9)! Lisa Gardner 3 Boyette Springs ES 45 ((sqrt 9 + sqrt 9) - 1) x 9 Lisa Jackson 4 Cheat Lake Elementary 45 sqrt9[9+(sqrt9)! ]x1 Kathleen Paul 8 St.Jude School, Brooklyn, NY 46 (sqrt9! *sqrt9! )+(9+1) Michael Falls 6 Raymond Park Middle School 46 (sqrt9! *9)-(9-1) Michael Falls 6 Raymond Park Middle School 46 1 +9+(sqrt9)!(sqrt9)! Lisa Gardner 3 Boyette Springs ES 47 (-1 - (sqrt9)! )+ (9)(sqrt9)! Lisa Gardner 3 Boyette Springs ES 47 9[(sqrt9)! ]-(sqrt9)! -1 Jenna Thompson 7 St.Jude School, Brooklyn, NY 48 [9 - 1] x [sqrt(9) + sqrt(9)] Christine Alaniz 7 Wilson Central Junior High, West Lawn, PA 48 (9-sqrt9)x(9-1) Jinane Beaubrun 8 St.Jude School, Brooklyn, NY 48 (sqrt9! *9)-(sqrt9! *1) Michael Falls 6 Raymond Park Middle School 48 (1)(sqrt9)!(9) -(sqrt9)! Lisa Gardner 3 Boyette Springs ES 49 [sqrt(9)! x 9] - [sqrt(9)! -1] Christine Alaniz 7 Wilson Central Junior High, West Lawn, PA 49 (1+(sqrt9)!)^((sqrt9)! /(sqrt9)) Wendy Cheung 10 The Bishop Strachan School 49 (sqrt9! *9)-(sqrt9! -1) Michael Falls 6 Raymond Park Middle School 49 1 +(sqrt9)!(9) -(sqrt9)! Lisa Gardner 3 Boyette Springs ES 49 9[(sqrt9)! ]-(sqrt9)! +1 Jenna Thompson 7 St.Jude School, Brooklyn, NY 50 [sqrt(9)! x 9] - [sqrt(9)+1] Jon Daley 7 Wilson Central Junior High, West Lawn, PA 50 (sqrt9! *9)-(sqrt9+1) Michael Falls 6 Raymond Park Middle School 50 (-1 -sqrt9) + 9(sqrt9)! Lisa Gardner 3 Boyette Springs ES 50 9[(sqrt9)! ]-sqrt9-1 Artur Wawrzak 7 St.Jude School, Brooklyn, NY 50 (sqrt9)! *9-(sqrt9)-1 Ms. Stonequist's Math Class 6 Marie Murphy School

Please notify Judy Ann Brown of any errors.

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