Adam's age is a multiple of 9 this year.
His age 5 years later will be multiple of 10.
- What is Adam's age this year?
- What was Adam's age 6 years ago?
- What is Adam's age 8 years later?
Multiple(s) of 9: 9, 18, 27, 36, 45
Multiple(s) of 9 (+5): 14, 23, 32, 41, 50
Multiple(s) of 10: 10, 20, 30, 40, 50
50 appears in both the multiples of 10 and the multiples of 9 (+5).
50 is Adam's age 5 years later.
(a) Adam's age this year = 45
(b) Adam's age 6 year ago = 45 - 6 = 39
(c) Adam's age 9 years later = 45 + 8 = 53
Answer(s): (a) 45; (b) 39; (c) 53