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Problems > High School Math > 2007

A Really, Really, Ridiculously Big Number

1. When 44444444 is written in decimal notation, the sum of its digits is A. Let B be the sum of the digits of A. Find the sum of the digits of B. (A, B are written in decimal notation.)


2. What is the largest number that can be obtained as the product of positive integers that add up to 100?



Source: unknown


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