total number of zeros in the right in the product 1*2*3............24*25 will be

M4maths Previous Puzzles

21 Sep 2011 zero

total number of zeros in the right in the product 1*2*3............24*25 will be

OPtion

1) 0
2) 1
3) 2
4) 3
5) 4
6) 5
7) 6
8) 7
9) 8
10) none of these

Solution

1*2*3*4.........24*25 has 5=5*1,10=5*2,15=5*3,20=5*4,25=5*5 so total number of 5 is equal to 6,
so total number of zeros in the right will be 6

Correct Option: 7 Best Solution (8)

jai Narayan Mishra   12 years AGO

Total No of Zeroes Can be Calculated by a formula
n!= (n/5)+(n/5^2)+(n/5^3)+......so on
Here we have to find number of zeroes in 25!..
I.e. (25/5)+(25/5^2)=5+1=6..
Hence Number of zeroes in 1*2*3*......*23*24*25 i.e. in 25! is 6...

Like? Yes (11) | No (1)  

harikrishnan   12 years AGO

zeros can be obtained by 10,20,5*2=10,15*4=60,8*25=200
there are 6 zeros

Like? Yes (2) | No   

dharmil   12 years AGO

6.
the value is..
15,511,210,043,330,985,984,000,000.

Like? Yes (1) | No   

Balakumaran N.A   12 years AGO

25! contains 6 zeros in the right...

Like? Yes (1) | No   

akshay tr   12 years AGO

answer is 15511210043330985984000000

Like? Yes (1) | No   

HIMANSHU KUMAR   12 years AGO

1.........10,we will get 2 zeros.i.e.2*5 and 10
11........20,12*15 and 20.i.e 2 zeros
21........25,24*25.i.e 2 zeros

Like? Yes (1) | No   

Prince varshney   12 years AGO

Divide 25 by 5 to find no. of 5 which will come twice and then divide quotient by 5 we will get 1 so no. of fives are 5+1=6. now get no. of two`s with above process we will get 22 no. of two`s now no. of zeros will be formed by multiplication of 2 and 5 so the common combination is 6

Like? Yes (1) | No   

raman   12 years AGO

1*2*...24*25=155112100433000985984000000

Like? Yes (1) | No (1)