Adam's age is a multiple of 7 this year.
His age 6 years ago was a multiple of 10.
- What is Adam's age this year?
- What was Adam's age 5 years ago?
- What is Adam's age 4 years later?
Multiple of 7: 7, 14, 21, 28, 35, 42, 49, 56
Multiple of 7 (-6): 1, 8, 15, 22, 29, 36, 43, 50
Multiple of 10: 10, 20, 30, 40, 50
50 appears in both the multiples of 7 (-6) and the multiples of 10.
Adam's age 6 years ago = 50
(a) Adam's age this year = 56
(b) Adam's age 5 year ago = 56 - 5 = 51
(c) Adam's age 7 years later = 56 + 4 = 60
Answer(s): (a) 56; (b) 51; (c) 60