Adam's age is a multiple of 6 this year.
His age 5 years ago was a multiple of 7.
- What is Adam's age this year?
- What was Adam's age 9 years ago?
- What is Adam's age 2 years later?
Multiple of 6: 6, 12
Multiple of 6 (-5): 1, 7
Multiple of 7: 7
7 appears in both the multiples of 6 (-5) and the multiples of 7.
Adam's age 5 years ago = 7
(a) Adam's age this year = 12
(b) Adam's age 9 year ago = 12 - 9 = 3
(c) Adam's age 6 years later = 12 + 2 = 14
Answer(s): (a) 12; (b) 3; (c) 14