Răspuns:
cmmdc (56, 70, 84) = 14
cmmdc (236, 196) = 4
cmmdc (825, 950) = 25
cmmdc (900, 1680) = 60
Explicație pas cu pas:
56 = 2³ × 7
70 = 2 × 5 × 7
84 = 2² × 3 × 7
cmmdc (56, 70, 84) = 2 × 7 = 14
(la cmmdc se iau doar factorii comuni la puterea cea mai mica)
236 = 2² × 59
196 = 2² × 7²
cmmdc (236, 196) = 2² = 4
825 = 3 × 5² × 11
950 = 2 × 5² × 19
cmmdc (825, 950)= 5² = 25
900 = 2² × 3² × 5²
1680 = 2⁴ × 3 × 5 × 7
cmmdc (900, 1680)= 2² × 3 × 5 = 60
