This visual number riddle asks: Which number gets bigger when you turn it upside down?
The answer is: 6.
When the digit 6 is turned upside down, it becomes 9.
Since 9 is greater than 6, the number has effectively become bigger.
The riddle works because it is not asking you to perform any arithmetic. Instead, it asks you to think about the physical appearance of a number when rotated.
It is a simple visual trick, but that is exactly why it catches people. Many readers start looking for a mathematical pattern when the solution is simply to turn the digit around in your mind.
