amazing about numbers


Do you know,



Letters 'a', 'b', 'c' &'d' do not appear anywhere in the spellings of 1 to 99
(Letter 'd' comes for the first time in Hundred)


Letters 'a', 'b' & 'c' do not appear anywhere in the spellings of 1 to 999
(Letter 'a' comes for the first time in Thousands)


Letters 'b' & 'c' do not appear anywhere in the spellings of 1 to 999,999,999
(Letter 'b' comes for the first time in Billion)


And


Letter 'c' does not appear anywhere in the spellings of entire English counting

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