The units of a two-digit number is 1 less than the tens digit. Nine times the tens digit is less than the number with the digits reversed. Find the least such number.

• 65
  Two digit numbers with unit digit 1 less than the tens digit are 21,32,43,54,65,76,87,98
  & the condition of 9 times the tens digit less than the number with digits reversed is satisfied by the number 65, 76, 87, 98
  6*9=54 which is less than number with digits reversed i.e. 56
  so such a least number is 65
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