Question
1 + 2 + 3 + … … + 38 + 39 + 40. When the first 40 whole numbers are added up. What is the digit in the tens place of this total?
2 m

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1 + 2 + 3 + … … + 38 + 39 + 40. When the first 40 whole numbers are added up. What is the digit in the tens place of this total?