[tex] \frac{1}{2}+ \frac{1}{4}+ \frac{1}{7}= \frac{14}{28}+ \frac{7}{28}+ \frac{4}{28}= \frac{25}{28} [/tex] - studiaza matematica, studiaza natura si mediteaza
rezulta ca cei 3 sunt 3/28 din intreg
[tex]3: \frac{3}{28}=3* \frac{28}{3}= \frac{3*28}{3}= \frac{84}{3} [/tex]=84:3=28
28 de elevi avea Pitagora