Adam's age is a multiple of 5 this year.
His age 5 years later will be multiple of 7.
- What is Adam's age this year?
- What was Adam's age 10 years ago?
- What is Adam's age 7 years later?
Multiple(s) of 5: 5, 10, 15, 20, 25, 30
Multiple(s) of 5 (+5): 10, 15, 20, 25, 30, 35
Multiple(s) of 7: 7, 14, 21, 28, 35
35 appears in both the multiples of 7 and the multiples of 5 (+5).
35 is Adam's age 5 years later.
(a) Adam's age this year = 30
(b) Adam's age 10 year ago = 30 - 10 = 20
(c) Adam's age 5 years later = 30 + 7 = 37
Answer(s): (a) 30; (b) 20; (c) 37