Adam's age is a multiple of 6 this year.
His age 3 years ago is a multiple of 7.
Adam's age is between 20 and 30.
- What is Adam's age this year?
- What is Adam's age 3 years ago?
- What is Adam's age 2 years later?
Multiple of 6: 6, 12, 18, 24
Multiple of 6 (-3): 3, 9, 15, 21
Multiples of 7: 7, 14, 21
21 appears in both the multiples of 6 (-3) and the multiples of 7.
(a) Adam's age this year = 24
(b) Adam's age 3 year ago = 24 - 3 = 21
(c) Adam's age 2 years later = 24 + 2 = 26
Answer(s): (a) 24; (b) 21; (c) 26