i'm assuming COUNTIF is function i need to use, however, if there is better
way i'm all ears. have row of values and would like to be able to count
number of values which are a multiple of three, i.e. if i have row of numbers
from 1 to 9, formula would return 3; numbers 1 to 10, returns 3, numbers 1 to
11, 3; numbers 1 to 12, returns a 4. the number of values will vary and not
be contiguous but will/can be in ascending order.