Latest self Aptitude Question SOLUTION: what is the number of zeroes at end of product of numbers between 1 to 100?

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what is the number of zeroes at end of product of numbers between 1 to 100?

Madhu (11 years ago)

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PARAG KAMRA  (11 years ago)

An easier way to solve these kinds of problems is dividing the highest numbers to the powers of 5

100/5=20
100/25= 4
20+4 = 24 Zeros

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vivek chauhan  (11 years ago)

24 is right answr.

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Saumitra Dey  (11 years ago)

for first hundred natural numbers,
100/5=20
20/5=4
then answer is (20 +4)

take another example
for first two hundred natural numbers,
200/5=40
40/5=8
8/5=1 (take round figure)
then answer is (40+8+1)

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vivek chauhan  (11 years ago)

method to find no. of 0's at end first find all 2's nd 5's factor in those no.
then no. of 0's at end will be equal to n. wher n= no of 2's factor or no. of 5's factors (which is less).
ex.=4*8*5
so 2's factor=5
nd 5's factor=1
so answr=1

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nayana s  (11 years ago)

THE SOLUTION IS 31...
b'cz while multiplying these numbers,we would come across with unit numbers 2*5 or 5*4,,where we get single zero in the unit place,during the multiplication between 1-9,11-19,so on...
Then we get 2*10=20 zeros(except the multiplication of 10,20,30,....100)
wen we multiplied the obtained answer with these 10,20,30,...100,,we will get 20+11=31 number of zeros...

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Madhu  (11 years ago)

But the answer given is 127.please anybody explain how it is possible.

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