Adam's age is a multiple of 11 this year.
His age next year will be multiple of 9.
Adam's age is between 40 and 50.
- What is Adam's age this year?
- What was Adam's age 3 years ago?
- What is Adam's age 9 years later?
Multiple of 11: 11, 22, 33, 44
Multiple of 11 (+1): 12, 23, 34, 45
Multiple of 9: 9, 18, 27, 36, 45
45 appears in both the multiples of 11 (+1) and the multiples of 9.
(a) Adam's age this year = 44
(b) Adam's age 3 years ago = 44 - 3 = 41
(c) Adam's age 9 years later = 44 + 9 = 53
Answer(s): (a) 44; (b) 41; (c) 53