Combinations of numbers (upto 5 digits numbers) which appear the same when viewing upside down..?

eg- 08080, 90806, etc

• only 0,8,9,6 can be used for upside down
  -----
  in 3rd place only 0 and 8 can be sitted
  and in 1st place and 2nd place all 4 digits can be sitted so total no of combination=4*4*2*1*1=32(ans)
  last 2 place become 1 bcz they should be mirror of 1st 2 place
• 11 years agoHelpfull: Yes(16) No(5)
• If we fill the first place with 8 then last place must have 8(Like 80008)
  similarly if we fill it with 0 then last digit will be 0.
  But if we place 6 or 9 in first place we have to put 9 and 6 respectively at last place.( like 60009)
  Similarly for each no. we place at 2nd place the 2nd last no. is fixed. There is no such condition for 3rd no. since it is middle. Hence we have to only choose 1st, 2nd and 3rd no.
  For 1st place we have 0,6 or 8 =3 choices
  For 2nd place we have 0,6 or 8 =3 choices
  For 3rd place we have 0,6 or 8 =3 choices
  total no. of numbers =3 x 3 x 3
  Ans= 27
  If we also consider 1(if we draw one like '|' ) then = 4 x 4 x 4 = 64
  
• 11 years agoHelpfull: Yes(2) No(1)
• there will be five digits 0,3, 6,8,9 that appear same when viewing upside down and there will be combination of 1, 2,3,4,5 digit numbers(means upto 5 digits)= 5+5^2+5^3+5^4+5^5=3905
• 11 years agoHelpfull: Yes(1) No(13)
• using 0,8 only we get 5c2ways(08800,88888,...)
  using combination like 6---9( we put 0 or 8 )and get 3C2ways
  using combination like 66-99(we put 0 or 8)and get 2ways
  using combination like -6-9-(we put 0 or 8)and get 3C2ways
  so 30*3*3*2=540ways
• 11 years agoHelpfull: Yes(0) No(4)
• for 0 at one place last digit wiil be zero ,for 6 at second place 9 will be at 4 th place hence
  for 0 at one place =12 ways
  for 6 at one place =12 ways
  for 8 at one place =12 ways
  for 9 at one place =12 ways
• 11 years agoHelpfull: Yes(0) No(2)
• for 0 at one place last digit wiil be zero ,for 6 at second place 9 will be at 4 th place hence
  for 0 at one place =12 ways
  for 6 at one place =12 ways
  for 8 at one place =12 ways
  for 9 at one place =12 ways
  total=48 ways
• 11 years agoHelpfull: Yes(0) No(2)
• plz any budy explain me why we take 0,3,6,8,9 and what is meaning appearing the same when viewing upside down..?
• 11 years agoHelpfull: Yes(0) No(0)