Adam's age is a multiple of 4 this year.
His age 4 years later will be multiple of 6.
- What is Adam's age this year?
- What was Adam's age 3 years ago?
- What is Adam's age 9 years later?
Multiple(s) of 4: 4, 8
Multiple(s) of 4 (+4): 8, 12
Multiple(s) of 6: 6, 12
12 appears in both the multiples of 6 and the multiples of 4 (+4).
12 is Adam's age 4 years later.
(a) Adam's age this year = 8
(b) Adam's age 3 year ago = 8 - 3 = 5
(c) Adam's age 4 years later = 8 + 9 = 17
Answer(s): (a) 8; (b) 5; (c) 17