Join the USAMO Guide Discord Server. Regular updates are posted there!

Let me Join!
Dismiss

Problem 25 (1988 AJHSME)

AJHSMENormal

From module Counting Fundamentals

Problem

A palindrome is a whole number that reads the same forwards and backwards. If one neglects the colon, certain times displayed on a digital watch are palindromes. Three examples are: 1:01,4:441:01, 4:44, and 12:2112:21. How many times during a 1212-hour period will be palindromes?

Select an answer

Show me the solution

← Back to all problems