find the number of three digit number.such that when taken from left to right they form an A.P. or G.p

• 44 numbers
  
  (i) considering AP - there are 16*2 + 4 cases.
  
  {123, 135, 147, 159, 234, 246, 258, 345, 357, 369, 456, 468, 567, 579, 678, 789} and their reverse number also.
  four more numbers .....{210, 420, 630, 840}
  
  (ii) considering GP - there are eight numbers.
  
  {124, 139, 248, 469} and their reverse numbers .
• 11 years agoHelpfull: Yes(6) No(2)
• i think numbers 111 222 333 etc will also be considered here
• 11 years agoHelpfull: Yes(4) No(0)