Adam's age is a multiple of 3 this year.
His age 3 years later will be multiple of 5.
- What is Adam's age this year?
- What was Adam's age 2 years ago?
- What is Adam's age 9 years later?
Multiple(s) of 3: 3, 6, 9, 12
Multiple(s) of 3 (+3): 6, 9, 12, 15
Multiple(s) of 5: 5, 10, 15
15 appears in both the multiples of 5 and the multiples of 3 (+3).
15 is Adam's age 3 years later.
(a) Adam's age this year = 12
(b) Adam's age 2 year ago = 12 - 2 = 10
(c) Adam's age 3 years later = 12 + 9 = 21
Answer(s): (a) 12; (b) 10; (c) 21