Adam's age is a multiple of 9 this year.
His age 4 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
Multiple of 9 (-4): 5
Multiple of 5: 5
5 appears in both the multiples of 9 (-4) and the multiples of 5.
Adam's age 4 years ago = 5
(a) Adam's age this year = 9
(b) Adam's age 8 year ago = 9 - 8 = 1
(c) Adam's age 9 years later = 9 + 2 = 11
Answer(s): (a) 9; (b) 1; (c) 11