Question

11,20,57,280 ______series​

Answer 1

Answer:

$\huge \sf{\green{\fbox{\red{\fbox{\green{\fbox{\red{ANSWER}}}}}}}}$

640

Step-by-step explanation:

#SAGARTHELEGEND

Answer 2

Answer:

Step-by-step explanation:

Given :

11,20,57,280 ______series​

Solution :

640 is the answer