Mary has some marbles. If she packs them in boxes of 5, she will have 4 extra marbles. If she packs them in boxes of 7, she will have 6 extra marbles. What is the minimum number of marbles Mary has?
Multiples of 5: 5, 10, 15, 20, 25, 30
Multiples of 5 (+4): 9, 14, 19, 24, 29, 34
Multiples of 7: 7, 14, 21, 28
Multiples of 7 (+6): 13, 20, 27, 34
Minimum number of marbles that Mary has = 34
Answer(s): 34
