Răspuns :
peri /---/
meri /---/---/---/---/ }856
ciresi /---/---/
pruni /---/
856:8=107 peri; 107 pruni
meri 4x107=428
ciresi 2x107=214
verificare 107+428+214+107=856
meri /---/---/---/---/ }856
ciresi /---/---/
pruni /---/
856:8=107 peri; 107 pruni
meri 4x107=428
ciresi 2x107=214
verificare 107+428+214+107=856
PE+M+C+PR=856
M=4PE
M=2C
⇒4PE=2C⇒2PE=C⇒C=2PE;
C=2PR⇒2PR=2PE⇒PR=PE;
⇒PE+4PE+2PE+PE=856
⇒8PE=856
⇒PE=856/8
⇒PE=107[PERE];
⇒M=4PE
⇒M=4·107
⇒M=428[MERI];
⇒C=2PE
⇒C=2·107
⇒C=214[CIRESE];
⇒PR=PE⇒PR=107[PRUNE];
M=4PE
M=2C
⇒4PE=2C⇒2PE=C⇒C=2PE;
C=2PR⇒2PR=2PE⇒PR=PE;
⇒PE+4PE+2PE+PE=856
⇒8PE=856
⇒PE=856/8
⇒PE=107[PERE];
⇒M=4PE
⇒M=4·107
⇒M=428[MERI];
⇒C=2PE
⇒C=2·107
⇒C=214[CIRESE];
⇒PR=PE⇒PR=107[PRUNE];