With five numbers there are 5 ways to group 4 of them together. If you take the averages of each group of 4 numbers and get...
3428.5
3425.75
3398
3120.25
342.5
What are the 5 numbers?
By multiplying all of the averages by 4 I elimanated the division by 4 when you take the average and set up the following system.
a+b+c+d=13714
a+c+d+e=13703
a+b+d+e=13592
a+b+c+e=12481
b+c+d+e=1370
By solcving this system of equaitons you will arive at the fact that the five numbers are.
1, 12, 123, 1234, 12345

Posted by casey
on 20050208 20:35:15 