Q.
The remainder when x=1! +2! +3! +......+100! is divided by 240 is:
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a
153
b
33
c
73
d
187
answer is A.
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Detailed Solution
Forr≥6 ; r! is divisible by 240. Thus when x is divided by 240, the remainder is 1! +2! +3! +......5!=153
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