But note that neither of 489 or 237 are divisible by 7.

The smallest number greater than 237 divisible by 7, is 238.

The greatest number less than 437 divisible by 7 is, 434.

Is the answer still 37? Or is it 36? Or is it something else?

MBAlad wrote:

Yes 37 is correct.

You add the 1 when stated for the inclusive to include the first term, because after you've substracted, the first term effectively becomes 0.

So multiples of 6 between 60 and 100:

100-60/6 = 40/6 6r4 However, this does not include the original term of 60 which is divisible by 6. Hence 6+1