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Number of zeros in the end product of... is

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abhas
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PostSubject: Number of zeros in the end product of... is Tue Dec 09, 2008 7:11 pm

Number of zeros in the end product of 56 * 67 * 78 ....* 3031 is?
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PostSubject: Re: Number of zeros in the end product of... is Tue Dec 09, 2008 7:11 pm

Solution
If we write prime factors of this 5 will come in
5,10,15,20,25,30
So power of 5 will be 6 11 16 21 2*26 (because 25 is 5^2) 31
= 137
Power of 2 will be much more than 137
So there will be 137 zeros
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