Adam's age is a multiple of 3 this year.
His age 3 years later will be multiple of 4.
- What is Adam's age this year?
- What was Adam's age 2 years ago?
- What is Adam's age 2 years later?
Multiple(s) of 3: 3, 6, 9
Multiple(s) of 3 (+3): 6, 9, 12
Multiple(s) of 4: 4, 8, 12
12 appears in both the multiples of 4 and the multiples of 3 (+3).
12 is Adam's age 3 years later.
(a) Adam's age this year = 9
(b) Adam's age 2 year ago = 9 - 2 = 7
(c) Adam's age 3 years later = 9 + 2 = 11
Answer(s): (a) 9; (b) 7; (c) 11