A
The Missing Numbers: 2, 4, 6, __ , 10, __
What is 8 and 12?
The Missing Numbers: 3, 6, 9, __ , 15, __
What is: 12 and 18.
The Missing Numbers: 12, 10, 8, __, 4 , __ ...
What is: 6 and 2
The Missing Numbers: 10, 20, 30, __ , 50, __
What is 40 and 60?