Adam's age is a multiple of 7 this year.
His age 3 years ago is a multiple of 8.
Adam's age is between 30 and 40.
- What is Adam's age this year?
- What is Adam's age 4 years ago?
- What is Adam's age 4 years later?
Multiple of 7: 7, 14, 21, 28, 35
Multiple of 7 (-3): 4, 11, 18, 25, 32
Multiples of 8: 8, 16, 24, 32
32 appears in both the multiples of 7 (-3) and the multiples of 8.
(a) Adam's age this year = 35
(b) Adam's age 4 year ago = 35 - 4 = 31
(c) Adam's age 4 years later = 35 + 4 = 39
Answer(s): (a) 35; (b) 31; (c) 39