Adam's age is a multiple of 8 this year.
His age 2 years ago is a multiple of 7.
Adam's age is between 10 and 20.
- What is Adam's age this year?
- What is Adam's age 8 years ago?
- What is Adam's age 7 years later?
Multiple of 8: 8, 16
Multiple of 8 (-2): 6, 14
Multiples of 7: 7, 14
14 appears in both the multiples of 8 (-2) and the multiples of 7.
(a) Adam's age this year = 16
(b) Adam's age 8 year ago = 16 - 8 = 8
(c) Adam's age 7 years later = 16 + 7 = 23
Answer(s): (a) 16; (b) 8; (c) 23