English Counting

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 Thousand) Letters ‘B‘ & ‘C‘…