Adam's age is a multiple of 7 this year.
His age 2 years ago was a multiple of 4.
- What is Adam's age this year?
- What was Adam's age 2 years ago?
- What is Adam's age 3 years later?
Multiple of 7: 7, 14
Multiple of 7 (-2): 5, 12
Multiple of 4: 4, 8, 12
12 appears in both the multiples of 7 (-2) and the multiples of 4.
Adam's age 2 years ago = 12
(a) Adam's age this year = 14
(b) Adam's age 2 year ago = 14 - 2 = 12
(c) Adam's age 7 years later = 14 + 3 = 17
Answer(s): (a) 14; (b) 12; (c) 17