Today’s challenge is a tricky riddle that has confused many people worldwide, so focus carefully before answering.
Riddle:
When I was 2, my sister was twice my age. Now I’m 40—how old is my sister?
At age 2, your sister was 4, so the age difference is 2 years. That difference stays the same.
So now that you are 40, your sister is 42 years old.