Respuesta:
1 a=si. B=no. C=no. D=si. E=no. F=no.
2. 1/2,12/24. 3/4,12/16. 2/5,16/40.
3. 36/48=18/24,6/12,3/6. 72/96,144/192,288/384.
80/240=40/120,20/60,10/30. 160/480,320/960,640/1920.
216/360=108/180,54/90,27/45. 432/720,864/1440,1728/2880.
4 a=21/12=7/4. B=7/23=14/46. C=x. D=x
5. A=48/240=3/15. B=165/330=x. C=3/15. D=x. E=5/8. F=x
