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A number is such that its ten digit is twice its unit digit. Prove that the number itself must be seven times the sum of its digit
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A number is such that its ten digit is twice its unit digit. Prove that the number itself must be seven times the sum of its digit
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Jul 10, 2015
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A number is such that its ten digit is twice its unit digit. Prove that the number itself must be seven times the sum of its digit
Mathematics
high-school
Saif Hamed
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Saif Hamed
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x - ten digit
y - unit digit
So it's true.
Rainbowgoblin
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Jul 14, 2015
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Rainbowgoblin
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