Mr. Sih has some files. If he ties them in bundles of 7, he will have 4 extra files. If he ties them in bundles of 6, he would be short of 3 files. What is the smallest possible number of files Mr. Sih has?
Multiples of 7: 7, 14, 21, 28, 35
Multiples of 7 (+4): 11, 18, 25, 32, 39
Multiples of 6: 6, 12, 18, 24, 30, 36, 42
Multiples of 6 (-3): 3, 9, 15, 21, 27, 33, 39
Smallest possible number of files that Mr. Sih has = 39
Answer(s): 39
