Welcome to the forum. I've not used either but someone on the forum might have.

You could also consider:

https://www.mathsisfun.com/index.htm

Not my work ... I think it's a brilliant site for learning maths, and it's free! Most pages have a test yourself link, and there are cross links between pages, so if you meet a word you're not sure about you can switch over to a page that will explain that. You would have to construct your own programme of learning but that's not a bad thing anyway.

Bob

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Visit my page: https://www.stabilitamerica.com/

For example, consider the following set of data: 1, 2, 3, 3, 4, 5, 5, 5, 6. In this dataset, the value 5 occurs most frequently, three times, so the mode of this dataset is 5.

The mode is just one of several measures of central tendency used in statistics. Other measures of central tendency include the mean, which is the sum of all the values divided by the total number of values, and the median, which is the value that lies in the middle of the dataset when the values are arranged in order.

The mode is particularly useful when dealing with categorical data, such as the favorite color of a group of people or the type of car they drive.

]]>I've mostly heard of the AoPS books(the general subject ones, not the competition ones) and Lang's Basic Mathematics and Geometry textbook. But I'm not sure which ones to choose.

AoPS books are larger and I'd guess go more into detail into many of the topics, from algebra to precalculus, yet they are insanely expensive if I want to buy more than two and due to not living in the US, buying them one by one is expensive as well due to import tax and shipping. On the other hand I've found Basic Mathematics online for free, and it seems to cover literally everything from introductory algebra and geometry to some subjects we don't even take much of in school, and the geometry book seems awesome as well(I just like geometry).

Are the AoPS books worth it? Will they teach me something Lang won't? Or should I just stick to Lang and then go on to more advanced things later on?

I'd appreciate any advice you can offer.

Thank you for your time.

https://web.evanchen.cc/napkin.html]]>

McGwaw Hill Education (India) Private Limited:

Competitive Examinations:

Part - 1

1. Number Systems - 1

2. Number Systems - 2

3. Number Systems - 3

4. Number Systems - 4

5. Progressions

Part - 2

6. Averages

7. Alligations

8. Percentages

9. Profit, Loss, and Discount

10. Simple and Compound Interest

11. Ratio, Proportion, and Variation

12. Partnerships

13. Time and Work

14. Pipes and Cisterns

15. Time, Speed, and Distance

16. Circular Motion

17. Trains

18. Boats and Streams

19. Races and Fames of Skill

Part - 3

20. Geometry and Mensuration

Part - 4

21. Permutations and Combinations

22. Probability

23. Trigonometry

24. Heights and Distance

Part - 5

25. Data Interpretation

26. Data Sufficiency

Now, I'm highly got interested in learning geometry by playing a game called "euclidea" but I forgot all the basics that I've learnt in my school so, where should I start learning?

Any resources and suggestions always welcome.

Are you still interested in learning geometry one chapter at a time?

]]>Most people are lazy and simply use QED

but if its at the end of a mathematical statement QEF is an alternative. If Euclid used it who are we to disagree.

"Q,E.F." is an abbreviation for the Latin phrase "quod erat faciendum" ("that which was to be done"). It is a translation of the Greek words used by Euclid to indicate the end of the justification of a construction, while "Q.E.D." was the corresponding end of proof of a theorem Latin abbreviation for quod erat demonstrandum: "Which was to be demonstrated." Q.E.D. may appear at the conclusion of a text to signify that the author's overall argument has just been proven.

QED and QEF are normally less formally written omitting the full stops

]]>corrected errors, sorry for that

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