Maths:7 Interesting facts

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  1. Letters 'a', 'b', 'c' &'d' do not appear anywhere in the spellings of 1 to 99
  2. Letter 'd' comes for the first time in Hundred
  3. Letters 'a', 'b' & 'c' do not appear anywhere in the spellings of 1 to 999
  4. Letter 'a' comes for the first time in Thousand
  5. Letters 'b' & 'c' do not appear anywhere in the spellings of 1 to 999,999,999
  6. Letter 'b' comes for the first time in Billion
  7. And Letter 'c' does not appear anywhere in the spellings of entire English counting

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