Respuesta :

ANSWER IS 1

explaination is that that the ony number tht 11 and 13 times table comes in

Answer:

1

Step-by-step explanation:

11 doesn't have any factors except for 1*11

13 doesn't have any factors except for 1*13

they both have a 1

therefore the greatest common factor of 11 and 13 is 1

Hope this helps! :D