Adam's age is a multiple of 5 this year.
His age 3 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 7 years later?
Multiple(s) of 5: 5, 10, 15, 20, 25
Multiple(s) of 5 (+3): 8, 13, 18, 23, 28
Multiple(s) of 7: 7, 14, 21, 28
28 appears in both the multiples of 7 and the multiples of 5 (+3).
28 is Adam's age 3 years later.
(a) Adam's age this year = 25
(b) Adam's age 7 year ago = 25 - 7 = 18
(c) Adam's age 5 years later = 25 + 7 = 32
Answer(s): (a) 25; (b) 18; (c) 32