The tens digit of a two digit number is twice the units digit. If the digits are reversed, the new number is 36 less than the original number. Find the number.

• let unit digit be x, tens digit be y
  so y=2x
  10y+x-(10x+y)=36
  =>9y-9x=36
  =>y-x=4
  =>2x-x=4 [since y=2x]
  and y=8
  number is 84
  after exchange 48
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• ans- 84
  here tens digit(8) is twice of unit digit(4) , after reverse the digits new number is 48 , which is 36 less than 84 (84-48=36).
• 9 years agoHelpfull: Yes(0) No(0)