Question

maximo común divisor de (12,15);(10,15);(20,30);(4,21)

Answer 1

Veamos:
MCM de:
12-15 /3
4-5
MCM=3

10-15 /5
2-3
MCM=5

20-30 /2   (2x5)=10
10-15 /5   
2-3
MCM=2x5 =10

4-21 /1
4-21
MCM=1