Adam's age is a multiple of 4 this year.
His age 2 years later will be multiple of 9.
- What is Adam's age this year?
- What was Adam's age 3 years ago?
- What is Adam's age 3 years later?
Multiple(s) of 4: 4, 8, 12, 16
Multiple(s) of 4 (+2): 6, 10, 14, 18
Multiple(s) of 9: 9, 18
18 appears in both the multiples of 9 and the multiples of 4 (+2).
18 is Adam's age 2 years later.
(a) Adam's age this year = 16
(b) Adam's age 3 year ago = 16 - 3 = 13
(c) Adam's age 4 years later = 16 + 3 = 19
Answer(s): (a) 16; (b) 13; (c) 19