Adam's age is a multiple of 8 this year.
His age 4 years later will be multiple of 7.
- What is Adam's age this year?
- What was Adam's age 7 years ago?
- What is Adam's age 10 years later?
Multiple(s) of 8: 8, 16, 24
Multiple(s) of 8 (+4): 12, 20, 28
Multiple(s) of 7: 7, 14, 21, 28
28 appears in both the multiples of 7 and the multiples of 8 (+4).
28 is Adam's age 4 years later.
(a) Adam's age this year = 24
(b) Adam's age 7 year ago = 24 - 7 = 17
(c) Adam's age 8 years later = 24 + 10 = 34
Answer(s): (a) 24; (b) 17; (c) 34