Certain 3-digit numbers have the following characteristics:
1. All the three digits are different.
2. The number is divisible by 7.
3. The number on reversing the digits is also divisible by 7.
How many such 3-digit numbers are there?
a. 2
b. 4
c. 6
d. 8

• 8
  write the numbers that are divisible by 7
  then given that three numbers should be different
  so strike off those numbers which are equal
  do it for one type of series i.e;for two hundred terms the numbers divisible by 7 are 203,210,217,224,231,238,245,252,259,266,273,280,287,295
  but according to the given first condition the numbers divisible are
  203,210,217,231,238,245,259,287,294.
  and another condition given is while reversing the numbers they should be divisible by 7
  so by this only 259 can be divisible by 7 by reversing it also
  in the way 159, 259,359,459,659,759,859 will be the numbers divisible by 7 with all the conditions sastisfied
  the 3-digit numbers divisible are 7
• 6 years agoHelpfull: Yes(2) No(5)
• 495 and 959 and completes all the rules
• 6 years agoHelpfull: Yes(0) No(2)