Seven times sum of its digits in Adults, Kids, Logic, Math with 1 comment What is the smallest whole number that is equal to seven times the sum of its digits? 21 Show Answer Use this equation to get the answer: 10a+b = 7(a+b). Taking b as 1; you solve for a to get 2. Explanation Share:
Why take b as 1??? Take a as 1... youll get different answer... Explain??
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