Adam's age is a multiple of 7 this year.
His age 5 years ago was a multiple of 9.
- 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 7: 7, 14
Multiple of 7 (-5): 2, 9
Multiple of 9: 9
9 appears in both the multiples of 7 (-5) and the multiples of 9.
Adam's age 5 years ago = 9
(a) Adam's age this year = 14
(b) Adam's age 8 year ago = 14 - 8 = 6
(c) Adam's age 7 years later = 14 + 2 = 16
Answer(s): (a) 14; (b) 6; (c) 16