The greatest common factor of two numbers, one of which is 1, will always be 1.
Answer:
for the first question it would be A. 4+8+16+32 because infinite series are such as :
9,18,36,72,144,288
10,20,40,80,160,
so basically its multiplying *2
I cant do #2 without seeing the formula
4:3 8:6 24:18 20:15 is the complete ratio table.