Question
1 + 2 + 3 + … … + 70 + 71 + 72. When the first 72 whole numbers are added up. What is the digit in the tens place of this total?
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1 + 2 + 3 + … … + 70 + 71 + 72. When the first 72 whole numbers are added up. What is the digit in the tens place of this total?