# Tagged Questions

70 views

### $1.99999999…$ periodic number is really $2$? [duplicate]

Someone told me yesterday that is mathematically demonstrated that $1.99999999999999...$ and so is exactly $2$, as every periodic number is equal to his nearest integer. He wrote: x = 1,99999999... ...
62 views

### How to round $0.03446$ to three decimal places?

What is $0.03446$ rounded to three decimal places? I think it is $0.035$ but someone told me that it should be $0.034$. I think $0.035$ because the $6$ would change the $4$ into a $5$, which ...
49 views

### How to do long division $1.068 / 40$ without using a calculator?

1.068 divided by 40. 1.068 / 40 = ? How would you do this problem by long division and any other methods to figure this out without using a calculator. Just pencil and paper.
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### How do I convert from binary base to decimal?

I have a homework problem and I don't understand it. Here is the problem: The base two number 11111(base 2) has the same digit in all places. The same number can be written in different bases. Find ...
26 views

### How to find proportions: x as a proportion of y.

I have two questions, firstly, what is 21 as a proportion of 510 (expressed as a decimal), and secondly, what is 66 as a proportion of 510 (expressed as a decimal)?
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### Find digits $x$, $y$, $z$, and $p$ such that $(xyzp)_{10}=4\cdot (pzyx)_{10}$

Given that equation $xyzp=4\cdot pzyx$ is valid, how do I solve showing my work clearly? By trial and error the valid answers are $x=8,y=7,z=1,p=2$. These are the only conditions provided.
815 views

### Converting decimal ratio to a percentage

Note before; I have searched the site and can't find an answer to this question, so that I wouldn't make a duplicate. I couldn't find the answer already so I either didn't search properly, or this ...