Adam's age is a multiple of 5 this year.
His age next year will be multiple of 12.
Adam's age is between 30 and 40.
- What is Adam's age this year?
- What was Adam's age 2 years ago?
- What is Adam's age 4 years later?
Multiple of 5: 5, 10, 15, 20, 25, 30, 35
Multiple of 5 (+1): 6, 11, 16, 21, 26, 31, 36
Multiple of 12: 12, 24, 36
36 appears in both the multiples of 5 (+1) and the multiples of 12.
(a) Adam's age this year = 35
(b) Adam's age 2 years ago = 35 - 2 = 33
(c) Adam's age 4 years later = 35 + 4 = 39
Answer(s): (a) 35; (b) 33; (c) 39