# http://math-utilities.com/ - A website for frequently used utilities(factorization, remainder, prime check, real roots of polynomials, etc. )

Hi Brilliant folks,

I made a website http://math-utilities.com/, for the sake of this community. Feel free to head over to that page, and make use of it. I love this problem solvers community and felt its my bit to help others along their journey.
Thanks a lot! Any cheers and blessings are much appreciated.

Note by Siva Bathula
3 years, 8 months ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> 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"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$ ... $$ or $ ... $ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

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Nice Code.Well Done!!!!!!!!!!!!!!!!!!!!!!!!

- 3 years, 8 months ago

Thank you. Thumbs up :)

- 3 years, 8 months ago

Neat website!

(25^27^29)mod1000 [works 99% of the time]

Why do you think that this function does not always work?

Polynomial equation solver(real roots only). Uses biection method.

What if there are multiple real roots between the "Start" and "End"?

- 3 years, 8 months ago

The remainder finding algorithm fails in certain cases. I am not yet sure if it is closer to 100% but I have improved it to cut down some border cases. The polynomial eq. solver gives all real roots between Start and End. Thanks a lot for the neat comment! Looking forward for more positive feedback.

- 3 years, 8 months ago

Your "bisection method" section might be flawed.

I've submitted 1,3,3,1 for the coefficients, and the range between -10 and 10.

The answer spits out -1.007937, but it should be just -1 (with a multiplicity of 3).

Plus, you might want to add a function to find the multiplicity of the roots.

Your "Cubic equation solver" might be flawed as well.

I've submitted 1,3,3,1 for the coefficients as well, and it outputs: NaN for all x1, x2, x3.

Your GCD and LCM are flawed too.

If I submit "-2, -4" in GCD, it should spit out 2, not -2.

If I submit "-2, -1, -3" in LCM, it should spit out 6, not -6.

- 3 years, 8 months ago

Yeah, I was too fast to commit, without checking all the possibilities.

- 3 years, 8 months ago

@Siva Bathula Good work!

Thanks for it.

- 3 years, 8 months ago

Nice website!

- 3 years, 8 months ago

Good website

- 3 years, 8 months ago

Will you please send me ur email address. I have to send you some solutions.

- 3 years, 7 months ago

How to find last three digits of 7^999 without using Euler's function or by using it also. Will it be true for all primes like 13^999 or any other. Please let me know it. And about this website, it is a good one.

- 3 years, 7 months ago

Great!

- 3 years, 1 month ago

How to get PDF of functional equations book by BJ Venkatachala

- 3 years, 7 months ago

It's pdf is not available

- 3 years, 7 months ago