Question
In which numbers does the digit '7' has the smallest value. Give the answer in letter. (Eg a)
  1. 4709
  2. 7914
  3. 1971
  4. 1947


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In which numbers does the digit '7' has the smallest value. Give the answer in letter. (Eg a)
  1. 4709
  2. 7914
  3. 1971
  4. 1947