A number series question :-
Look at this series: F2, __, D8, C16, B32, ... What number should fill the blank?
 Please answer with explanation :)

Answer :

A letter is decreased by 1; the numbers are multiplied by 2. So, the answer should be E4.
the answer is E4 BECAUSE THERE IS DECREASE BY 1 IN LETTERS AND NUMBERS ARE MULTIPLIED BY 2

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