Adam's age is a multiple of 7 this year.
His age 4 years ago was a multiple of 2.
- What is Adam's age this year?
- What was Adam's age 7 years ago?
- What is Adam's age 10 years later?
Multiple of 7: 7, 14
Multiple of 7 (-4): 3, 10
Multiple of 2: 2, 4, 6, 8, 10
10 appears in both the multiples of 7 (-4) and the multiples of 2.
Adam's age 4 years ago = 10
(a) Adam's age this year = 14
(b) Adam's age 7 year ago = 14 - 7 = 7
(c) Adam's age 7 years later = 14 + 10 = 24
Answer(s): (a) 14; (b) 7; (c) 24