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Certain 3-digit numbers 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

[Paper II (CSAT) Analysis 2017]
A
B
C
D

EXPLANATION

  Ans (b) It seems a difficult one indeed, but with some persistenc...
...
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