Adam's age is a multiple of 7 this year.
His age 3 years later will be multiple of 9.
- What is Adam's age this year?
- What was Adam's age 5 years ago?
- What is Adam's age 3 years later?
Multiple(s) of 7: 7, 14, 21, 28, 35, 42
Multiple(s) of 7 (+3): 10, 17, 24, 31, 38, 45
Multiple(s) of 9: 9, 18, 27, 36, 45
45 appears in both the multiples of 9 and the multiples of 7 (+3).
45 is Adam's age 3 years later.
(a) Adam's age this year = 42
(b) Adam's age 5 year ago = 42 - 5 = 37
(c) Adam's age 7 years later = 42 + 3 = 45
Answer(s): (a) 42; (b) 37; (c) 45