Adam's age is a multiple of 7 this year.
His age 5 years later will be multiple of 3.
- What is Adam's age this year?
- What was Adam's age 4 years ago?
- What is Adam's age 9 years later?
Multiple(s) of 7: 7
Multiple(s) of 7 (+5): 12
Multiple(s) of 3: 3, 6, 9, 12
12 appears in both the multiples of 3 and the multiples of 7 (+5).
12 is Adam's age 5 years later.
(a) Adam's age this year = 7
(b) Adam's age 4 year ago = 7 - 4 = 3
(c) Adam's age 7 years later = 7 + 9 = 16
Answer(s): (a) 7; (b) 3; (c) 16