October 2016: A collborative sodoku is given to start this new school year:
BG fills the first column on the left, FR the middle column and IT the third column on the right.
(1) = 36 - 1
(2) = Solve equation : x + 2 = 5
(3) = Numerator of simplified fraction 108414
(4) = 94 + 194
(5) = Solve equation : (x – 4) (x – 3)= 0 and add the solutions
(6) = 43 6
(7) = Solve this system of linear equations : 2x + y = 82x + 4y = 14 and add the solutions
(8) = An odd prime number
(9) = Solve equation : 3x + 2 = 14
(10) = Image of 4 by function defined by f(x) = x2 – 3x + 5
(11) = Sove this system of linear equation : x + y = 6x – y = – 2 and give the product of the solutions
(12) = Total number of axes of symmetry existing in any square
(13) = Reciprocal of 0,5
(14) = 29
(15) = One third of 27
(16) = Add all probabilities of all outcomes of a trial and give this sum.
(17) = Numerator of 12 + 34
(18) = Power of 10 which equals 1000
(19) = (23) 26
(20) = 12 + 74 + 123 – 14
(21) = Power of 2 which is equal to 8
(22) = 10 31 000
(23) = Pre-image of 3 by function f defined by : f(x) = 2x – 7
(24) = Solve this system of linear equations : 5x + 2y = 633x – 2y = 25 and give the difference of the solutions
(25) = Total number of sides of equal length existing in any isosceles triangle
(26) = 12,5 % de 48
(27) = 185 252 15
(28) = Total number of planets in the solar system
(29) = Total number of possible remainders obtained when dividing any whole number by 4
(30) = Solve equation : x + 43 = 193
(31) = Mean of the following whole numbers : 15, 12, 7 and 2
(32) = 273
(33) = Total number of vertices contained in Kheops pyramid
(34) = 81 – 64
(35) = 125 + 1755 + 7
(36) = 4th odd whole number
(37) = Total number of axes of symmetry existing in any rectangle
(38) = Number whose square root equals 22
(39) = Solve equation : x2 + 4 = 92
(40) = 4 raised up to 75 %
November 2016: below is the FR contribution. and the file to be further completed.
November 2016: below is the BG contribution
April 2017: FR students ended the remaining colomn. Would you like BG or IT partners end this collaborative sodoku for us please?
Hello,We are the French students. As you can see we have filled the remaining column. Today we ask you, Bulgarian or Italian to end this task by filling the blank spaces. We will be happy to have finished a Sudoku with people who live abroad. This challenge would not have been possible without the twinspace.
Thanks you for everything !
Matthis RIVAT, Paul MENARD, Adrien HEOT
June 2017: BG team, SODOKU - answer
Download: 
Final production is just the show the story of this activity.
