Solve integer equations, determine remainders of powers, and much more with the power of Modular Arithmetic.
If you start watching a 57-minute-long episode of a TV show at 8:42 pm, what time will it be when the episode is over?
If your birthday is on a Monday this year and neither this year nor the next year is a leap year, what day of the week will your birthday be on next year?
On the first day of class, a teacher writes her name on the board in a secret code:
What is the actual last letter of her last name?
If the local time in Tokyo is 16 hours ahead of the local time in San Francisco, and you take a 10-hour flight from Tokyo to San Francisco that leaves Tokyo at 2 pm Tokyo time, what time will it be in San Francisco when you land?
If you go 38 hours without sleeping starting at 8 am, and then you sleep for the next 11 hours, what time will it be when you wake up?