Find x, y, z that are positive integers which satisfy this equation

does anyone know how to quickly identify prime numbers?

thanks.

I feel stupid honestly, and fyi, I did go over every question. Focus is counting with symmetry

I have 4 days till this test, I'm wondering how do I get a 300+ and what do I need to know, thank you.

Find all the real solution for this equation

This was the 2015 national team round problem 10...


[quote=The hardest problem in MathCounts]
In the city of Trichotomy, every day the weather is exactly one of the following:
sunny, cloudy or rainy. Each day has a 50% chance of having the same weather
as the day before and a 25% chance of having each of the other two types of
weather. If it does not rain on Friday, what is the probability that there will be
no rain during the weekend (Saturday and Sunday)? Express your answer as a
common fraction.
[/quote]

Have you participated in the MATHCOUNTS competition before?

Does anyone know when you get your FTW rating?? please tell me.

Hello AOPS,

As we enter the New Year, the most exciting part is figuring out the mathematical connections to the number we have now temporally entered

Here are some facts about 2025:

If anyone has any more facts about 2025, enlighted the world with a new appreciation for the year


(I got some of the facts from this video)

Hey, so as a 6th grader, my big goal for MAP this spring is to get a 300 (ambitious, i know). I'm currently at a 285 (288 last year though). I'm already taking a intro to counting and probability course (One of my weak points), but is there anything else you recommend I focus on to get a 300?