Adam's age is a multiple of 3 this year.
His age 3 years later will be multiple of 10.
- What is Adam's age this year?
- What was Adam's age 4 years ago?
- What is Adam's age 7 years later?
Multiple(s) of 3: 3, 6, 9, 12, 15, 18, 21, 24, 27
Multiple(s) of 3 (+3): 6, 9, 12, 15, 18, 21, 24, 27, 30
Multiple(s) of 10: 10, 20, 30
30 appears in both the multiples of 10 and the multiples of 3 (+3).
30 is Adam's age 3 years later.
(a) Adam's age this year = 27
(b) Adam's age 4 year ago = 27 - 4 = 23
(c) Adam's age 3 years later = 27 + 7 = 34
Answer(s): (a) 27; (b) 23; (c) 34