Adam's age is a multiple of 7 this year.
His age 2 years later will be multiple of 5.
- What is Adam's age this year?
- What was Adam's age 8 years ago?
- What is Adam's age 3 years later?
Multiple(s) of 7: 7, 14, 21, 28
Multiple(s) of 7 (+2): 9, 16, 23, 30
Multiple(s) of 5: 5, 10, 15, 20, 25, 30
30 appears in both the multiples of 5 and the multiples of 7 (+2).
30 is Adam's age 2 years later.
(a) Adam's age this year = 28
(b) Adam's age 8 year ago = 28 - 8 = 20
(c) Adam's age 7 years later = 28 + 3 = 31
Answer(s): (a) 28; (b) 20; (c) 31