Adam's age is a multiple of 9 this year.
His age 2 years ago was a multiple of 5.
- What is Adam's age this year?
- What was Adam's age 8 years ago?
- What is Adam's age 2 years later?
Multiple of 9: 9, 18, 27
Multiple of 9 (-2): 7, 16, 25
Multiple of 5: 5, 10, 15, 20, 25
25 appears in both the multiples of 9 (-2) and the multiples of 5.
Adam's age 2 years ago = 25
(a) Adam's age this year = 27
(b) Adam's age 8 year ago = 27 - 8 = 19
(c) Adam's age 9 years later = 27 + 2 = 29
Answer(s): (a) 27; (b) 19; (c) 29