Question

Sequence I: 9, 13, 17, 21, ...

Sequence II: 117, 120, 123, 126,...
Sequence III: 54, 61, 68, 75, ...
Which of the following lists the sequences in order from least common difference to greatest common difference?

Answer 1

II, I, III

Explanation:

To find the least common difference, you just need to subtract one number in the sequence by the previous number (see how much is between each number in the sequence) For II, the GCD is 3, for I, it is 4, and for III, it is 7.