Natalie has more than 60 but less than 70 chocolate bars. If she puts them equally into bags of 7, she would be short of 2 chocolate bars. If she puts them equally into bags of 10, she would have 8 extra chocolate bars. How many chocolate bars does Natalie have?
Multiples of 7: 49, 56, 63, 70, 77
Multiples of 7 (-2): 47, 54, 61, 68, 75
Multiples of 10: 50, 60, 70, 80
Multiples of 10 (+8): 58, 68, 78, 88
Common number more than 60 but less than 70: 68
Number of chocolate bars that Natalie has = 68
Answer(s): 68