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Four Nines Problem

Problem #41
Deadline to submit the solution: June 30th , 2001

Use† four 9ís to write four† arithmetic expressions that are equal to 1.

You may use parenthesis .

(Example:† (9:9) x (9:9) = 1 ).

 

Solutions:



NISHANTH
from U.S.A
Grade: 2nd Age: 7 School: P.S.199Q
Solution:
Q1: 99/99=1
Q2: (9+9)/(9+9)=1
Q3: (9*9)/(9*9)=1

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Rachele Chaar from AbuDhabi
Grade: 4 Age: 9 School: Chouiefat School
Solution:

1- (9*9):(9*9)=1
2- (9+9):(9+9)=1
3- 99 : 99 =1
4- (9:9)*(9:9)=1

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EDDIE from United States
Grade: 2 Age: 8 School: Seawell School
Solution:
Q1: (9-9+9):9
Q2: (9*9):(9*9)
Q3: (9+9):(9+9)
4:(9-9)+(9:9)
About me: My name is Eddie Liu. I live in Chapel Hill, North Carolina. I like to play Game Boy and volley ball.
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