Originally Posted by

**christina** Vivienne starts counting going by 3s from 4:

4,7,10,13….

Chloe starts

counting backwards from 744 by 7s:

744, 737, 730, 723

They start saying their sequences at the same time and simultaneously say one number every second

i)What is the difference between the 7th numbers they both say?

(Using the arithmetic sequence formula) – I got 682 which is not the right answer ><

ii)Which number do they both say at the same time?

I need some help with this question, thank you for any help given