Question
Find the sum of the sum of the sum of digits (i.e. digit sum) of 25! [e.g. digit sum of 378 = 3+7+8 = 18 : 1+8 = 9]
Answer: Option A :
A
Option (a)
Digit Sum = Remainder whenanumber is dividedby 9
25!9Rem=0⇒ Digit Sum=9
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