Latest TCS Aptitude Question SOLUTION: find the sum of 1!+2!+3!+4!+...100!

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find the sum of 1!+2!+3!+4!+...100!

Asked In TCS Shishir kumar (11 years ago)

Unsolved Read Solution (15)

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Read Solution (15) :

Payal Parul  (11 years ago)

abe barnisa ki bacchi toda chota solution nhi de sakti!

Is this solution Helpfull? Yes (17) | No   

DEBANJAN BODE  (11 years ago)

101!/100 - 100!(1/100+2/100...+1), so 100!(1+1/100)=100!*101/100=101!/100

Is this solution Helpfull? Yes (10) | No (10)  

Sourangsu Bandyopadhyay  (11 years ago)

This looks more like a programming question than an aptitude question to me!!
Well, The solution can be derived as:
Summation(1!+2!+3!+....+100!)
Summation(n) where n=1 to n=100
The answer: 94269001683709979260859834124473539872070722613982672442938359305624678223479506023400294093599136466986609124347432647622826870038220556442336528920420940313

The above is a computer simulated result!!

Is this solution Helpfull? Yes (8) | No (40)  

Somnath Das  (11 years ago)

let us take 100! common from the series:
100!( 1!/100!+ 2!/100!+ 3!/100!+....+ 99!/100! + 100!/100!)
most of the terms will be negligible..
100!(1/100 + 1)
101*100!/100
101!/100 Ans

Is this solution Helpfull? Yes (6) | No   

Saloni Singh  (11 years ago)

@barnisa :
lol!

Is this solution Helpfull? Yes (3) | No (1)  

Sourangsu Bandyopadhyay  (11 years ago)

@payal & @saloni Kya karu yaar!! Iss jaise question ka toh aisa hi jawab hona chahiye naah...

Is this solution Helpfull? Yes (2) | No   

sourav kumar sharma  (11 years ago)

kya bat chat0

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SAPTARSHI MONDAL  (11 years ago)

(n+1)!/n is formula

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Samik Bandopadhyay  (11 years ago)

la jawaab!

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vinay kumar  (11 years ago)

give the options. last digit would be 3. then check from opsns

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Jyanti Prasad  (11 years ago)

101!-100! = 101(100!)-100! = 100!(101-1) = 100! * 100

Is this solution Helpfull? Yes | No (1)  

Deb Das  (11 years ago)

may be ans is 101!-1

Is this solution Helpfull? Yes | No (3)  

parvez sajjad  (11 years ago)

Barnisa ki pan kore ans ta diacisss...?

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hitesh kumar gupta  (11 years ago)

5 will be the answer.
after 7! the remainder will be zero.
so 1!+2!+3!=4!+5!+6!=873 divide by 7 we have
5 as remainder

Is this solution Helpfull? Yes | No (3)  

Guru Pranav  (11 years ago)

101!/100 will be the sum !!!!

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