A professor writes N consecutive natural numbers, beginning with 1, on the blackboard. One of the students in the class deletes one of the numbers (exactly one number), from that list.
Now, given that the average of the remaining N-1 numbers is 271/16.
Can you find out the number that has been deleted from the list ?

The numbers are 1 to 33, except for 19
I.e., N=33, and 19 is the missing number

Posted by Richard Briscoe on 2003-09-03 04:09:33