Adam's age is a multiple of 9 this year.
His age 5 years later will be multiple of 7.
- What is Adam's age this year?
- What was Adam's age 4 years ago?
- What is Adam's age 8 years later?
Multiple(s) of 9: 9
Multiple(s) of 9 (+5): 14
Multiple(s) of 7: 7, 14
14 appears in both the multiples of 7 and the multiples of 9 (+5).
14 is Adam's age 5 years later.
(a) Adam's age this year = 9
(b) Adam's age 4 year ago = 9 - 4 = 5
(c) Adam's age 9 years later = 9 + 8 = 17
Answer(s): (a) 9; (b) 5; (c) 17