Adam's age is a multiple of 5 this year.
His age 5 years later will be multiple of 9.
- What is Adam's age this year?
- What was Adam's age 9 years ago?
- What is Adam's age 7 years later?
Multiple(s) of 5: 5, 10, 15, 20, 25, 30, 35, 40
Multiple(s) of 5 (+5): 10, 15, 20, 25, 30, 35, 40, 45
Multiple(s) of 9: 9, 18, 27, 36, 45
45 appears in both the multiples of 9 and the multiples of 5 (+5).
45 is Adam's age 5 years later.
(a) Adam's age this year = 40
(b) Adam's age 9 year ago = 40 - 9 = 31
(c) Adam's age 5 years later = 40 + 7 = 47
Answer(s): (a) 40; (b) 31; (c) 47