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How many ZEROES (NOT trailing zeroes) are there at \(2015!\)?

Note by Bryan Lee Shi Yang 2 years, 8 months ago

Easy Math Editor

*italics*

_italics_

**bold**

__bold__

- bulleted- list

1. numbered2. list

paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)

> This is a quote

This is a quote

# I indented these lines # 4 spaces, and now they show # up as a code block. print "hello world"

2 \times 3

2^{34}

a_{i-1}

\frac{2}{3}

\sqrt{2}

\sum_{i=1}^3

\sin \theta

\boxed{123}

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This seems to be a number theory problem, but here's my python solution for this.

1 2 3

from math import factorial print(str(factorial(2015)).count('0')) #Returns 1037, time taken=6ms

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Wheyy....you know python too? I thought you used C++ for CS!

Yeah I learnt python about a month ago due to lack of required data types in C++. Also, I am posting solutions in python now-a-days.

@Pranjal Jain – Amazing.

Can I call this "Python Jugaad" :P ?

Lol sure

@Pranjal Jain – Haha maybe "Python Pranjal".

@Bryan Lee Shi Yang – I do not like pythonic answers, I like traditional mathematical thinking and logical reasoning. Any body has a mathematical answer?

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Easy Math Editor

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

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TopNewestThis seems to be a number theory problem, but here's my python solution for this.

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Wheyy....you know python too? I thought you used C++ for CS!

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Yeah I learnt python about a month ago due to lack of required data types in C++. Also, I am posting solutions in python now-a-days.

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Can I call this "Python Jugaad" :P ?

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Lol sure

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