The sum of the digits of a two digit number is 8. If the digits are reversed the number is decreased by 54. Find the number.

a. 17
b. 71
c. 18
d. 81

• given a+b=8-->1
  10b+a=a+10a-54(- bcoz reverse of digit dec by 54)-->2
  from a+b=8
  a=8-b sub this in eq 2
  then we get 18b=18
  b=1
  a=7
  so original numb is 71
• 11 years agoHelpfull: Yes(10) No(4)
• Ans:71
  7+1=8
  71-17=54
• 8 years agoHelpfull: Yes(4) No(0)
• 10a+b=8
  10b+a=54
  
  check with the options..
  71-17 = 54
  
  original number is 71.
• 5 years agoHelpfull: Yes(0) No(0)
• 7+1 =8
  71-17 = 54
• 5 years agoHelpfull: Yes(0) No(0)