Adam's age is a multiple of 6 this year.
His age 4 years ago was a multiple of 4.
- What is Adam's age this year?
- What was Adam's age 10 years ago?
- What is Adam's age 7 years later?
Multiple of 6: 6, 12
Multiple of 6 (-4): 2, 8
Multiple of 4: 4, 8
8 appears in both the multiples of 6 (-4) and the multiples of 4.
Adam's age 4 years ago = 8
(a) Adam's age this year = 12
(b) Adam's age 10 year ago = 12 - 10 = 2
(c) Adam's age 6 years later = 12 + 7 = 19
Answer(s): (a) 12; (b) 2; (c) 19