Knowledge of ABC
(Asif Ali Bhatti, Lahore)
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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 In The Spellings Of Entire English
Counting.