WHAT HOW TO SOLVE THIS PLS PLS
PROBLEM IS AS FOLLOWS:
A clock that strikes only the hours has struck a total of 21 times in the last 2.5 hours. Seconds ago, it just finished striking the hour. What hour?
I DONT JUST WANT THE ANSWER. EXPLAIN HOW IT WORKS. PLS PLS PLS PLS - HELP TODAY, SAVE THE GRADES OF TOMORROW
THIS IS SERIOUS BUSINESS. PLS MAKE SURE IT IS GOOD EXPLINATIONS.