Adam's age is a multiple of 10 this year.
His age 5 years later will be multiple of 9.
- What is Adam's age this year?
- What was Adam's age 2 years ago?
- What is Adam's age 5 years later?
Multiple(s) of 10: 10, 20, 30, 40
Multiple(s) of 10 (+5): 15, 25, 35, 45
Multiple(s) of 9: 9, 18, 27, 36, 45
45 appears in both the multiples of 9 and the multiples of 10 (+5).
45 is Adam's age 5 years later.
(a) Adam's age this year = 40
(b) Adam's age 2 year ago = 40 - 2 = 38
(c) Adam's age 10 years later = 40 + 5 = 45
Answer(s): (a) 40; (b) 38; (c) 45