Latest TCS Aptitude Question SOLUTION: 123! 123 last two digits???

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(#M40028940) TCS question last 2 digits Keep an EYE

123!
123 last two digits???

Asked In TCS Arif Mallick (11 years ago)

Solved RAKESH Read Solution (9)

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RAKESH  (11 years ago)

no. of factors of 5 in 123! is given by
[123/5]+[123/5^2]+[123/5^3] where [] denotes greatest integer function
=24+4=28
i.e. 123! contains 5^28
there are more factors of 2 in 123!(greater than 28)
so 123! will contain 28 zeroes at the end of 123!
so last two digit is 00

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pankaj kumar  (11 years ago)

00
123!=1*2*3*......100*101.....
since 100 is there so last two digit is 00







=

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RAKESH  (11 years ago)

123!=1*2*3*4*...*122*123
it consists terms 10,20,30,...,100,110 etc
so last two digit will be 00

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Rajan Kumar  (11 years ago)

No,,,since in 123!
1*2*....10*...20*...90*...100*...110*..120*..123 is present.
So no. of zeros in 123! will be much more in the last.
So 123 will not be present in last.

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dipu  (11 years ago)

ques is 123^123! and ans is x1 nd x can be 0-9

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sross gupta  (11 years ago)

123*122*.......100*99....
hence last digit is00

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monia prasad  (11 years ago)

00 as it givess the rem 0

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parvez sajjad  (11 years ago)

00
bcz 100*x=100x

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Guru Pranav  (11 years ago)

00

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