Question 1
10 years ago, A was half as old as B. In 5 years, what will be the age difference between B and A?
10 years ago: A was 13, B was 16. Check: 13 = ½ × 16 ✓
Present ages: A = 23, B = 26
In 5 years: A = 28, B = 31
Age difference = |31 - 28| = 3
(Age difference stays constant over time = B - A = 3)
Present ages: A = 23, B = 26
In 5 years: A = 28, B = 31
Age difference = |31 - 28| = 3
(Age difference stays constant over time = B - A = 3)