Find the sum of all of the three digit positive integers with three distinct digits.

Let us consider a number having 1 as one of its digits. Then, clearly  the 100s place will contain  9*8=72 ones. The 10s , and the unit place will each consist of 8*8=64 1s

Edited on March 28, 2024, 9:03 am

Posted by K Sengupta on 2024-03-28 08:14:27