Brain Test Level 304
Question: Make the equation true: 9 + 5 = 2
This equation seems impossible in standard arithmetic, but you need to think about time.
Solution
Consider this calculation on a 12-hour clock face.
If it is 9 o'clock and you add 5 hours, what time is it?
9 + 5 = 14. On a 12-hour clock, 14:00 is 2 o'clock.
The equation 9 + 5 = 2 is correct when discussing time. Just hit the checkmark/submit button to proceed.
DIFFICULTY
Medium
PRO TIP
What kind of math repeats after 12?