Răspuns :
-notam cu I, II, III și IV nr. cautate:
=> I= 7•5=35
II= I+15
=> II=35+15=50
III= I-20
=> III= 35-20=15
=> IV=200-35-50-15
= 165 -50-15
= 115 -15
= 100
Proba: 35+50+15+100=
= 85 +15+100
= 100 +100
= 200
Răspuns : I =35
II =50
III =15
IV =100
=> I= 7•5=35
II= I+15
=> II=35+15=50
III= I-20
=> III= 35-20=15
=> IV=200-35-50-15
= 165 -50-15
= 115 -15
= 100
Proba: 35+50+15+100=
= 85 +15+100
= 100 +100
= 200
Răspuns : I =35
II =50
III =15
IV =100