Adam's age is a multiple of 4 this year.
His age next year will be multiple of 11.
Adam's age is between 30 and 40.
- What is Adam's age this year?
- What was Adam's age 3 years ago?
- What is Adam's age 4 years later?
Multiple of 4: 4, 8, 12, 16, 20, 24, 28, 32
Multiple of 4 (+1): 5, 9, 13, 17, 21, 25, 29, 33
Multiple of 11: 11, 22, 33
33 appears in both the multiples of 4 (+1) and the multiples of 11.
(a) Adam's age this year = 32
(b) Adam's age 3 years ago = 32 - 3 = 29
(c) Adam's age 4 years later = 32 + 4 = 36
Answer(s): (a) 32; (b) 29; (c) 36