Adam's age is a multiple of 5 this year.
His age next year will be multiple of 9.
Adam's age is between 30 and 40.
- What is Adam's age this year?
- What was Adam's age 6 years ago?
- What is Adam's age 5 years later?
Multiple of 5: 5, 10, 15, 20, 25, 30, 35
Multiple of 5 (+1): 6, 11, 16, 21, 26, 31, 36
Multiple of 9: 9, 18, 27, 36
36 appears in both the multiples of 5 (+1) and the multiples of 9.
(a) Adam's age this year = 35
(b) Adam's age 6 years ago = 35 - 6 = 29
(c) Adam's age 5 years later = 35 + 5 = 40
Answer(s): (a) 35; (b) 29; (c) 40