number system

The numbers 2,4,6,8,.....98,100 are multiplied together. The number of zeros at the end of the product must be:

10 12 13 11

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1 solution

Vaibhav Aggarwal
Sep 27, 2014

as 100 has two digits at last... same 10 -90 has 9 0's so 9+2=11

10 20 30 40 50 60 70 80 90*100=36288000000000000. This number has 12 0's, not 11! Dear Master, please, pay attention to the problem and its correct answer.

Dmitry Lebedev - 3 years, 10 months ago

1 pending report

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