Adam's age is a multiple of 6 this year.
His age 2 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, 18, 24, 30
Multiple of 6 (-2): 4, 10, 16, 22, 28
Multiple of 7: 7, 14, 21, 28
28 appears in both the multiples of 6 (-2) and the multiples of 7.
Adam's age 2 years ago = 28
(a) Adam's age this year = 30
(b) Adam's age 9 year ago = 30 - 9 = 21
(c) Adam's age 6 years later = 30 + 2 = 32
Answer(s): (a) 30; (b) 21; (c) 32