Adam's age is a multiple of 8 this year.
His age 6 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 4 years later?
Multiple of 8: 8, 16, 24, 32, 40, 48
Multiple of 8 (-6): 2, 10, 18, 26, 34, 42
Multiple of 7: 7, 14, 21, 28, 35, 42
42 appears in both the multiples of 8 (-6) and the multiples of 7.
Adam's age 6 years ago = 42
(a) Adam's age this year = 48
(b) Adam's age 9 year ago = 48 - 9 = 39
(c) Adam's age 8 years later = 48 + 4 = 52
Answer(s): (a) 48; (b) 39; (c) 52