Adam's age is a multiple of 5 this year.
His age 2 years ago was a multiple of 2.
- What is Adam's age this year?
- What was Adam's age 8 years ago?
- What is Adam's age 10 years later?
Multiple of 5: 5, 10
Multiple of 5 (-2): 3, 8
Multiple of 2: 2, 4, 6, 8
8 appears in both the multiples of 5 (-2) and the multiples of 2.
Adam's age 2 years ago = 8
(a) Adam's age this year = 10
(b) Adam's age 8 year ago = 10 - 8 = 2
(c) Adam's age 5 years later = 10 + 10 = 20
Answer(s): (a) 10; (b) 2; (c) 20