Adam's age is a multiple of 9 this year.
His age 2 years later will be multiple of 7.
- What is Adam's age this year?
- What was Adam's age 5 years ago?
- What is Adam's age 7 years later?
Multiple(s) of 9: 9, 18, 27, 36, 45, 54
Multiple(s) of 9 (+2): 11, 20, 29, 38, 47, 56
Multiple(s) of 7: 7, 14, 21, 28, 35, 42, 49, 56
56 appears in both the multiples of 7 and the multiples of 9 (+2).
56 is Adam's age 2 years later.
(a) Adam's age this year = 54
(b) Adam's age 5 year ago = 54 - 5 = 49
(c) Adam's age 9 years later = 54 + 7 = 61
Answer(s): (a) 54; (b) 49; (c) 61