A Math Forum Project

1999 Mathematics Game

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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 81 to 90

  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.

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