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  1. How much zeros has the number $1000!$ at the end?

    May 13, 2014 · yes it depends on $2$ and $5$. Note that there are plenty of even numbers. Also note that $25\times 4 = 100$ which gives two zeros. Also note that there $125\times 8 = 1000$ gives three zeroes and $5^4 \times 2^4 = 10^4$. Each power of $5$ add one extra zero. So, count the multiple of $5$ and it's power less than $1000$.

  2. What does it mean when something says (in thousands)

    I'm doing a research report, and I need to determine a companies assets. So I found their annual report online, and for the assets, it says (in thousands). One of the rows is: Net sales $ 26,234...

  3. arithmetic - How do you find the number of multiples of a given …

    Oct 16, 2014 · I know this sounds a bit stupid but this question always confounds me. Say that you are given a range of numbers like $20$-$300$. And it asks you to find how many multiples of $5$ are given in that...

  4. calculus - Optimization Problem. Find Smallest Perimeter of a …

    Nov 14, 2018 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

  5. functions - Difference between multiplying and dividing numbers …

    Feb 20, 2021 · Basically, what is the difference between $1000\times1.03$ and $1000/.97$? For some reason I feel like both should result in the same number. I only ask because I'm working a problem with a percentage of waste added in. For $3\%$ waste, I would think that you could multiply the amount by $1.03$ to add $3\%$. However, my professor divided by $.97$.

  6. Expected value of a coin toss - Mathematics Stack Exchange

    You flip a coin. If you get heads you win \\$2 if you get tails you lose \\$1. What is the expected value if you flip the coin 1000 times? I know that the expected value of flipping the coin once i...

  7. What does "X% faster" mean? - Mathematics Stack Exchange

    Feb 23, 2017 · $\begingroup$ That seems reasonable: 100% faster should mean twice the speed, so half the time; 1000% faster should mean eleven times the speed so 1/11 of the time, though I would always bear in mind they might mean ten times the …

  8. Puzzle - 123456789 = 100 with three operations? - Mathematics …

    May 29, 2015 · Given the sequence 123456789: You can insert three operations ($+$,$-$,$\\times$,$/$) into this sequence to make the equation = 100. My question is: is there a way to solve this without brute forc...

  9. How to calculate a Modulo? - Mathematics Stack Exchange

    Feb 28, 2018 · I really can't get my head around this "modulo" thing. Can someone show me a general step-by-step procedure on how I would be able to find out the 5 modulo 10, or 10 modulo 5.

  10. combinatorics - Probability of winning a prize in a raffle ...

    Dec 16, 2011 · You'll be surprised. The correct probability of winning at least one ticket is around $0.2242$. Assuming exactly one prize is given, your answer of $\frac{1}{160}$ is the pr

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