Wendy has more than 70 but less than 80 mochi balls. If she puts them equally into bags of 8, she would be short of 4 mochi balls. If she puts them equally into bags of 10, she would have 6 extra mochi balls. How many mochi balls does Wendy have?
Multiples of 8: 56, 64, 72, 80, 88
Multiples of 8 (-4): 52, 60, 68, 76, 84
Multiples of 10: 60, 70, 80, 90
Multiples of 10 (+6): 66, 76, 86, 96
Common number more than 70 but less than 80: 76
Number of mochi balls that Wendy has = 76
Answer(s): 76