Jack's age is a multiple of 8 this year. His age next year will be a multiple of 5. Jack is more than 60 years old. What is Jack's age this year?
Multiples of 8: 8, 16, 24, 32, 40, 48, 56, 64
Multiples of 8 (+1): 9, 17, 25, 33, 41, 49, 57, 65
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65
Common number = 65
Jack's age this year
= 65 - 1
= 64
Answer(s): 64
