Dec 2, 2016 · The number $137$ is a prime number.One of the permutation of $137$ is $173$, which is a prime number. The summation of $137$ digits is $11$ which is again a prime number! My question: Is there a name for this type of numbers? There are some other Properties for $137$ in Wikipedia. I found another Properties such that $137=2^7+2^3+1$ or the only ...

Aug 6, 2015 · 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.

Jun 10, 2015 · In aviation the 200/20 rule can be used. If your current heading in degree is below 180° e.g. 80° then you add 200 and subtract 20. 80+200=280. 280-20=260.

I need some help with this problem: $$439^{233} \\mod 713$$ I can't calculate $439^{223}$ since it's a very big number, there must be a way to do this. Thanks.

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

Jun 9, 2022 · A solution I got: $10001=11025-1024=105^2-32^2=137\times73$ which are primes. But no way could I have myself figured out that 10001 is difference of those 2 squares. But no way could I have myself figured out that 10001 is difference of those 2 squares.

Oct 27, 2017 · The cutoff is half way between two neighboring numbers you can round to. When rounding to the nearest $5$ you could round to $135$ or to $140$. The point half way between is $\frac 12(135+140)=137.5$ Any number less than $137.5$ (and greater than $132.5$) should be rounded to $135$. This is general.

Jun 11, 2020 · The dimension that contributes to the length of the total fence is the quantity $137~\text{mm}$. That's because the planks are usually set up so that $\text{height}>\text{width}>\text{depth}$ . Furthermore, I believe that the price of a single plank is based on the largest cross-sectional area of a single plank, that is $0.137~\text{m}\times 5. ...

For example: $$7x \\equiv 1 \\pmod{31} $$ In this example, the modular inverse of $7$ with respect to $31$ is $9$. How can we find out that $9$? What are the steps that I need to do? Update If I have a

There are $\frac{205}{250}$ well-prepared students and $\frac{137}{250}$ poorly prepared students who answered a certain item in the exam correctly. The goal is to do a hypothesis test to see whether the given item in the test that is answered correctly can be expected to be at least $15\%$ higher among well-prepared students than among poorly ...