+1 sagar pareek... i used the following approach: let the num be xy so... (10y + x) - (10x + y) is the distance travelled in 1 hr... now, the the next milestone must be a three digit number, which can be of following compostion: 1xy or xzy or yzx whr 0<=z<9 coz aif z=9, distance travlled in tht hr wud be more thn 100, which can nt be the case( in contradiction with the distance in 1st hr)... now if its 1xy, 9(y-x) = 100 + 9 (x-y) which can nt give integral soln..so num must be xzy...thn 9(y-x) = 99x + 10z - 9y... now fr integral solution: z must be a multiple of 9, can be 0 or 9... hence it has to be 0. so 9(y-x)=9(11x-y) 2y=12x y=6x posbl soln: x=0,y=0...rejected x=1, y=6... accepted
On Wed, Aug 17, 2011 at 11:22 PM, Rohit Srivastava <[email protected]>wrote: > logic plz? > > On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek <[email protected]>wrote: > >> 16, 61, 106 average speed is 45 miles/hour >> >> >> On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh < >> [email protected]> wrote: >> >>> A car is traveling at a uniform speed.The driver sees a milestone showing >>> a 2-digit number. After traveling for an hour the driver sees another >>> milestone with the same digits in reverse order.After another hour the >>> driver sees another milestone containing the same two digits. What is the >>> average speed of the driver? >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> >> >> -- >> **Regards >> SAGAR PAREEK >> COMPUTER SCIENCE AND ENGINEERING >> NIT ALLAHABAD >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
