Because I could only count up to 100, I used to believe the biggest number was 100, so therefore big items like cars and houses cost $100.
A childhood belief about counting

others believed things like this
- I used to believe that the inspection stickers on cars indicated the cost of the car, ie, a 12 meant $12 etc.Anon
- i used to belive that 100 was the biggest number in the world "i got at least a hundred marbles."— dan harris
- I thought that Count Dracula was the count from Sesame StreetAnon
- when i was little i believed that your social security number was the number you were born on the earth — christine
- I thought the no overtaking sign meant that red cars cannot drive by black cars.— Helen
- I thought small cars grew up to become big cars— carhugger