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Suma a 4 numere impare consecutive este88.Afla nr?


Răspuns :

 a+b+c+d=88
a |-----|
b |-----|...2
c |------|....4
d |------|.....6
      4 segmente
88-6-4-2=76 noua suma
76:4=19 a
19+2=21 b
19+4=23 c
19+6=25 d