Adam's age is a multiple of 10 this year.
His age 8 years ago was a multiple of 8.
- What is Adam's age this year?
- What was Adam's age 6 years ago?
- What is Adam's age 5 years later?
Multiple of 10: 10, 20, 30, 40
Multiple of 10 (-8): 2, 12, 22, 32
Multiple of 8: 8, 16, 24, 32
32 appears in both the multiples of 10 (-8) and the multiples of 8.
Adam's age 8 years ago = 32
(a) Adam's age this year = 40
(b) Adam's age 6 year ago = 40 - 6 = 34
(c) Adam's age 10 years later = 40 + 5 = 45
Answer(s): (a) 40; (b) 34; (c) 45