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Math Challenges

Rules: 

At the beginning of each month a Math challenge will come out.

To solve the challenge correctly, you have to:

      • Write the solution with an explanation on a paper with your name and group and left it in the mailbox situated in the hall, before the first day of the following month.
      • Write the reasoned solution in this website (at the bottom of the article).

There will be 3 categories: 

  • Pupils (ESO, Batxillerat and Professional Studies).
  • Teachers and PAS.

The winners will get an award the day of Sta. Georgina.

December challenge

To write the angles of a triangle we have used these six numbers: 7, 7, 7, 4, 5 and 6.

We know that an angle is 20 degrees greater than another.

How much measure the angles of this triangle?

 

November challenge

How many numbers of 5 different figures fulfill that the number of the units is the sum of the remaining four?

November solution:

We only have 7 combinations of 4 digit different numbers that add 6, 7, 8 or 9. The permutations of 4! are 24 (less 1/4 of that quantity because we don’t count the “0″ in the first position, and “0″ is in all the combinations: 18).
So 7×18=126

November winners:

  • Pupils:          Laia B., Elisenda B., Anna R., Sara M., Alex de los S i Hector C. (de 1r Batx) i Alex Batlle (de 2n Batx).
  • Teachers:    Enric M. i Paco R.

October challenge

October winners:

  • Teachers: Carme B., Paco R., Núria B., Enric M., Jaume P., Begoña M. i Carme B.
  • Pupils: Noah Byrne (de 3r ESO) , Albert C.(de 4t d’ESO), Mario B., Núria P., Anna R., Hug C., Òscar Á., Arnau  V., Queralt R., Héctor C., Laura B., Roger C., Adriàn G., Elisenda B., Laia B., Pau G., Clara S., Sara M., Quim V. i Alex de los S. (de 1r de Batx.) i   Víctor V. Sergi T., Ricard P., Lucia M., Àlex B., Guillem C.  i Guillem C. (de 2n Batx),      

 

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  1. admin escrigué:

    We only have 7 combinations of 4 digit different numbers that add 6, 7 8 or 9. The permutations of 4! are 24 (less 1/4 of that quantity because we don’t count the “0″ in the first position, and “0″ is in all the combinations).
    So 7×18=126
    Paco R.

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