Zane's age is a multiple of 7 this year. His age next year will be a multiple of 4. Zane is more than 30 years old. What is Zane's age this year?
Multiples of 7: 7, 14, 21, 28, 35
Multiples of 7 (+1): 8, 15, 22, 29, 36
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36
Common number = 36
Zane's age this year
= 36 - 1
= 35
Answer(s): 35