Question 888433
Do you mean the DIGITS 39 in order, or a multiple of 39?
If a multiple, divide 1000/39 to get 25 and change.
If you mean the digits, then...
39
139
239
339
439
539
639
739
839
939
but that's not all!  Don't forget the ones that BEGIN with
390
391
392
393
394
395
396
397
398
399
I get twenty.  How 'bout you?