posted by ivan .
hello I am new here my friend recommended me this website.
here is my question:
if a clock chimes the number of the hour every hour, how many times will it chime in a day?
it goes through the sequence of chimes from 1-12 twice during the day.
The sum of all the numbers from 1 to n is n(n+1)/2
So, the clock chimes
2 * (12*13)/2 = 156 times