A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:

A. 18 B. 24
C. 42 D. 81

• Option B 24
  Let the two digit number is 10x+y
  Product of the digits x*y=8
  10x+y+18=10y+x
  on solving this we get X-y=-2
  x+y=6
  by solving the above two equations we get x=2 and y=4
  therefore the digit is 10*2+4=24
• 12 years agoHelpfull: Yes(11) No(7)
• ans b 24
  satisfy all the given condition
• 11 years agoHelpfull: Yes(8) No(2)
• Just go in reverse order.Check with the subtracting 18 from each option for getting reverse number.
  ex : -> 42-18=24(which is in reverse).
  so answer is 42
• 12 years agoHelpfull: Yes(5) No(6)
• Through option checking take option b.24
  product of 2 & 4 is =8
  adding 24+18=42 which is reverse of 24
• 10 years agoHelpfull: Yes(2) No(0)
• 24
  bcze 24+18
• 8 years agoHelpfull: Yes(1) No(0)
• verifying the options:
  18+18=36(wrong)
  b)24+18=42 (this satisfies the given condition so this is the answer)
  
  
  ans:B
• 8 years agoHelpfull: Yes(1) No(0)
• 24 is the number
• 9 years agoHelpfull: Yes(0) No(0)
• 24 is the number
• 9 years agoHelpfull: Yes(0) No(1)
• 24
  2*4=8
  24+18=42
• 9 years agoHelpfull: Yes(0) No(0)
• answer is 24
• 8 years agoHelpfull: Yes(0) No(0)
• B. 24,
  
  24+18=42(reverse)
• 8 years agoHelpfull: Yes(0) No(0)
• B.24
  2*4=8
  24+18=42
• 8 years agoHelpfull: Yes(0) No(0)
• answer is 24
  given xy=8 and 10x+y+18=10y+x
  by solving above two eqns,we get x=2 & y=4. hence the number xy=24.
• 8 years agoHelpfull: Yes(0) No(0)
• B. 24
  2*4=8 when we add 24+18 it will become 42 which is reverse of 24.
  hence proved.
• 7 years agoHelpfull: Yes(0) No(0)
• B.24 Because 24+18 = 42
• 7 years agoHelpfull: Yes(0) No(0)
• Go with ans
  2*4=8
  24(two digit num)+18=42(reverse of number)
• 6 years agoHelpfull: Yes(0) No(0)
• 1. Let number be 10x+y
  xy=8
  when digits are reversed
  10x+y+18=10y+x
  on solving both eq.
  y=4,-2 (a negative value will discard)
  on putting value x=2
  ans=24 option(B)
• 5 years agoHelpfull: Yes(0) No(0)
• 2*4=8
  24+18=42
• 5 years agoHelpfull: Yes(0) No(0)