Adam's age is a multiple of 3 this year.
His age 2 years ago is a multiple of 8.
Adam's age is between 10 and 20.
- What is Adam's age this year?
- What is Adam's age 2 years ago?
- What is Adam's age 9 years later?
Multiple of 3: 3, 6, 9, 12, 15, 18
Multiple of 3 (-2): 1, 4, 7, 10, 13, 16
Multiples of 8: 8, 16
16 appears in both the multiples of 3 (-2) and the multiples of 8.
(a) Adam's age this year = 18
(b) Adam's age 2 year ago = 18 - 2 = 16
(c) Adam's age 9 years later = 18 + 9 = 27
Answer(s): (a) 18; (b) 16; (c) 27