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Funny way to divide by seven (Posted on 2018-01-12) Difficulty: 2 of 5
"This special big number of mine allows me to get a correct answer of dividing it by 7 by simply erasing its second digit..." - declared Danny.
After a minute or two his father, W.G. quipped: "I know what digit was erased!"

Do you?
Please post your reasoning.

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
Analytic solutionJer2018-01-13 15:32:38
another onexdog2018-01-13 12:29:37
Solutioncomputer finding of numbers that can be divided that wayCharlie2018-01-12 19:33:39
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