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The numbers 1, 3, 5, 25 are multiplied together. What is the number of zeros at the right end of the product?

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answer is C.

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Detailed Solution

Given numbers are,
1, 3, 5, 7,….,25
Here, each number is odd number.
For zero in last digit, 2 and 5 should be there as a factor of any number.
Here, 2 is an even number and it does not present in the given sequence, so we do not have

2 \times 5

as a factor of the product.
So, there is no zeros in end of the product of the provided series.
Therefore, option 3 is the correct answer.

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