Adam's age is a multiple of 10 this year.
His age 2 years ago was a multiple of 4.
- What is Adam's age this year?
- What was Adam's age 6 years ago?
- What is Adam's age 9 years later?
Multiple of 10: 10
Multiple of 10 (-2): 8
Multiple of 4: 4, 8
8 appears in both the multiples of 10 (-2) and the multiples of 4.
Adam's age 2 years ago = 8
(a) Adam's age this year = 10
(b) Adam's age 6 year ago = 10 - 6 = 4
(c) Adam's age 10 years later = 10 + 9 = 19
Answer(s): (a) 10; (b) 4; (c) 19