Maths:7 Interesting facts
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' 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