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.
| Solution | Name | Grade | School | |
| 81 | (sqrt9*9)*sqrt9*1 | Michael Falls | 6 | Raymond Park Middle School |
| 81 | (1^9)(9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 81 | (9 - 1) x 9 + 9 | Lisa Jackson | 4 | Cheat Lake Elementary |
| 81 | sqrt9xsqrt9x9x1 | Mireille Martineau | 7 | St.Jude School, Brooklyn,NY |
| 81 | (sqrt9*sqrt9)*9*1 | David Moudy | 7 | Raymond Park Middle School |
| 81 | (1+9)9-9 | Tom Muller | 8 | Reading-Fleming Middle School |
| 81 | 9x9x1^9 | Victoria | 5 | James River Elementary |
| 81 | (1+9)*9-9 | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 82 | 1+(9^sqrt9)/9 | Wendy Cheung | 10 | The Bishop Strachan School |
| 82 | sqrt9xsqrt9x9+1 | Elizabeth Fahey | 7 | St.Jude School, Brooklyn, NY |
| 82 | (sqrt9*9)*sqrt9+1 | Michael Falls | 6 | Raymond Park Middle School |
| 82 | 1^9 +9x9 | Lisa Gardner | 3 | Boyette Springs ES |
| 82 | (sqrt9*sqrt9*9+1 | David Moudy | 7 | Raymond Park Middle School |
| 82 | 1+sqrt9*9*sqrt9 | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 82 | 9x9+1^9 | Victoria | 5 | James River Elementary |
| 83 | (9x9+sqrt9)-1 | Tony Drake | 6 | Raymond Park Middle School |
| 83 | (9*9)+(sqrt9-1) | Michael Falls | 6 | Raymond Park Middle School |
| 83 | (-1 + sqrt9) + (9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 83 | ( 9x9 ) + sqrt 9 - 1 | Jessica Hammond | 4 | Cheat Lake Elementary |
| 83 | 9x9+sqrt9-1 | Tatiana Phanor | 8 | St.Jude School, Brooklyn, NY |
| 83 | 9 x 9 + sqrt(9) - 1 | J. D. Wilson | 7 | Wilson Central Junior High, West Lawn, PA |
| 83 | -1+(9*9)+sqrt9 | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 84 | (9*9)+(sqrt9*1) | Michael Falls | 6 | Raymond Park Middle School |
| 84 | (1 +9)(9) -(sqrt9)! | Lisa Gardner | 3 | Boyette Springs ES |
| 84 | ((9x9) + sqrt 9) x 1 | Jessica Hammond | 4 | Cheat Lake Elementary |
| 84 | 9x9+sqrt9x1 | Tatiana Phanor | 8 | St.Jude School,Brooklyn, NY |
| 84 | (1*sqrt9)+(9*9) | Chris Waid | 8 | RFMS |
| 84 | (1*sqrt9)+(9*9) | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 85 | (9*9)+(sqrt9+1) | Michael Falls | 6 | Raymond Park Middle School |
| 85 | (1 + sqrt9) + (9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 85 | 9x9+sqrt9+1 | Michelle Goldwyn | 8 | Reading-Fleming Middle School |
| 85 | ( ( 9x9 ) + sqrt 9 ) + 1 | Jessica Hammond | 4 | Cheat Lake Elementary |
| 85 | 9x9+sqrt9+1 | Tatiana Phanor | 8 | St.Jude School, Brooklyn, NY |
| 85 | (1+sqrt9)+(9*9) | Chris Waid | 8 | RFMS |
| 85 | 1+(9*9)+sqrt9 | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 86 | (9*9)+(sqrt9!-1) | Michael Falls | 6 | Raymond Park Middle School |
| 86 | (-1 + (sqrt9)!+ (9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 86 | 9x9+(sqrt9)!-1 | Daniel Natale | 7 | St.Jude School, Brooklyn, NY |
| 86 | (-1+sqrt9!)+(9*9) | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 87 | (9+1)x9-sqr9 | Sarah Bocik | 6 | Raymond Park Middle School |
| 87 | (1+9)x9-(sqrt9) | Wendy Cheung | 10 | The Bishop Strachan School |
| 87 | (9*9)+(sqrt9!*1) | Michael Falls | 6 | Raymond Park Middle School |
| 87 | (1+9)(9) -sqrt9 | Lisa Gardner | 3 | Boyette Springs ES |
| 87 | (9x9)+(sqrt9)!x1 | Daniel Natale | 7 | St.Jude School, Brooklyn, NY |
| 87 | 1*(9*9)+sqrt9! | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 88 | 1+9x9+((sqrt9)!) | Wendy Cheung | 10 | The Bishop Strachan School |
| 88 | (9*9)+(sqrt9!+1) | Michael Falls | 6 | Raymond Park Middle School |
| 88 | 1+ (sqrt9)! +(9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 88 | 9x9+sqrt9!+1 | Michelle Goldwyn | 8 | Reading-Fleming Middle School |
| 88 | (9*9)+(sqrt9)!+1 | David Moudy | 7 | Raymond Park Middle School |
| 88 | 9x9+(sqrt9)!+1 | Daniel Natale | 7 | St.Jude School, Brooklyn, NY |
| 88 | (1+sqrt9!)+(9*9) | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 89 | -1+9+9*9=89 | Jared Baker | 8 | Reading-Fleming middle school |
| 89 | (9*9)+(9-1) | Michael Falls | 6 | Raymond Park Middle School |
| 89 | (-1) +9 +(9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 89 | -1+9x9+9 | Michelle Goldwyn | 8 | Reading-Fleming Middle School |
| 89 | ((9 x 9) + 9) - 1 | Lisa Jackson | 4 | Cheat Lake Elementary |
| 89 | (9 x 9) + 9 - 1 | Will Morrison | 4 | Cheat Lake Elementary |
| 89 | (9*9)+9-1 | David Moudy | 7 | Raymond Park Middle School |
| 89 | 9x9+9-1 | Toni-Ann Syncon | 8 | St.Jude School, Brooklyn, NY |
| 89 | 9x9+9-1 | Chris Whitley | 6 | Raymond Park Middle School |
| 89 | (-1+9)+(9*9) | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| 89 | 9*9+9-1 | Math Group 11 | 8 | Ashford School |
| 90 | (9*9)+(9*1) | Michael Falls | 6 | Raymond Park Middle School |
| 90 | 1x9+9x9 | Chelsea Flaum | 10 | Gulf Coast High School |
| 90 | (1)(9) +(9)(9) | Lisa Gardner | 3 | Boyette Springs ES |
| 90 | (9x9)x1+9 | Sara Gobble | 6 | Raymond Park Middle School |
| 90 | 1x9x9+9 | Michelle Goldwyn | 8 | Reading-Fleming Middle School |
| 90 | ((9 x 9) + 9) x 1 | Lisa Jackson | 4 | Cheat Lake Elementary |
| 90 | (9 x 9 ) + (9 x 1) | Will Morrison | 4 | Cheat Lake Elementary |
| 90 | (9*9)+9*1 | David Moudy | 7 | Raymond Park Middle School |
| 90 | 1*9*9+9 | Chris Scanlan | 8 | Reading Fleming Middle School |
| 90 | (1+9)sqrt9*sqrt9 | Eric Stec | 8 | Reading Fleming Middle School |
| 90 | 9x9+9x1 | Toni-Ann Syncon | 8 | St.Jude School, Brooklyn, NY |
| 90 | (1^9+9)*9 | Chris Waid | 8 | RFMS |
| 90 | 9*9+9*1 | mathgroup10 | 8 | Ashford School |
| 90 | 9*9+9*1 | Math Group 11 | 8 | Ashford School |
| 90 | (1*9)+(9*9) | Jessica Erwin/Crystal Muguerza | 7 | T.A. Howard Middle School |
| Solutions 1 to 10 | Solutions 11 to 20 | Solutions 21 to 30 |
| Solutions 31 to 40 | Solutions 41 to 50 | Solutions 51 to 60 |
| Solutions 61 to 70 | Solutions 71 to 80 | Solutions 91 to 100 |
Please notify Judy Ann Brown of any errors.
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The Math Forum ** Judy Ann Brown ** 22 December 1998