anonymous
  • anonymous
the sum of the digits of a certain two-digit number equals the square root of the number? what is the number?
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
conside the number 23 \(23 = 2\times10+3\) so if a number is formed by two digits "a" and "b" then the number is \(a\times10+b\)
anonymous
  • anonymous
so, the condition in the problem gives us: \[a+b=\sqrt{a\times10+b}\]
anonymous
  • anonymous
thx. you

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