Puzzle # 1
When I was 6, my sister was half my age. Now I’m 50, how old is she?
Click to See Solution:
Answer: 47
Explanation:
When I was 6, my sister was half my age.
This means my sister was 6 ÷ 2 = 3 years old at that time.
From this, we can deduce that my sister is 3 years younger than me.
Now, since I am 50, my sister’s age is 50 – 3 = 47.
NOTE: The key to solving this puzzle is recognizing that the age difference between you and your sister remains constant over time. In this case, the 3-year difference that was established when you were 6 still applies when you are 50. By subtracting this constant difference from your current age, you find your sister’s age.