Portal:Mathematics

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Mathematics

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Interesting news

If mathematics is a language, then how does it seem to describe all the observed things in the universe from helical DNA structures to black holes. Mathematicians and scientists have talked about the unreasonable effectiveness of mathematics. So is mathematics inherent in the universe or is it part of the way the human brain is wired? This question is being studied and some recent research can be accessed here.

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Famous Scientists

Martin Gardner was a contemporary popular mathematics writer. His puzzles are enormously popular for children and adults. Watch this interesting video about Martin Gardner here.

A list of all his works can be found here.

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Categories

Categories in Mathematics

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Topics

Classroom resources

Find here mind maps, activities, video and multimedia resources for science lessons in Class 9.The resources have been developed to help build conceptual understanding and have been arranged according to the chapters in the textbook.

Mathematics foundational materials please Click here

For typing formula on KOER, please click here.

For Question papers and CCE activities please click here

For solved problems please click here

For additional resources and teaching activities click below:

1. Permutations and Combinations
2. Progressions
3. Graphs And Polyhedra
4. Probability
5. Polynomials
6. Sets
7. Activity for Co-ordinate Geometry
8. Mensuration
9. Trigonometry
10. Simultaneous_Linear_Equations
11. Triangles
12. Congruence of Triangles
13. Similar Triangles
14. Concurrency in triangles
15. Quadrilaterals
16. Circles
17. Circles Chord Properties
18. Circles Tangent Properties

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From the forum

Some interesting exchanges from the STF mailing forum.

To join the forum, visit this group here.

Square root of a number

The squre root of whole number is always less than the that square number ( ex; sqare root of 25 is 5, 36 is 6 etc) but in decimal it is reverse (ex; sqare root 0.8 is o.89) what is the reason? Shared by Suchetha SS, GHS Thyamagondulu.

[Read More]

CarMetal is a Geogebra like free software

A description of another graphic tool like Geogebra. Shared by Tharanath Achar, GPUC Belthangady.

[Read More]

Math teaser about an arithmetic progression

P th term of an AP is Q and Q th term of an AP is P . Then find PQ th term ?....Shared by Mallikarjun Sudi, GHS Yelheri and Sneha Titus, APU. [Read More]

Pi Day

Which day is Pi Day? [Find out]

Trigonometry using Geogebra

Basics of Trigonometry using Geogebra, lesson shared by Radha Narve, GHS Begur. Click [here] to read more.

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Fun corner

Phone number birthday puzzle

YOUR PHONE NUMBER WILL REVEAL YOUR AGE

Your Phone number will reveal your actual Age. It will take about 15 seconds,read and do it at the same time so that you will not lose the fun.

1. Take a look at your last digit of your cell phone number
2. Use this figure and multiply by 2
3. Then add 5
4. And then multiply by 50
5. And then add the number 1765
6. The last step; with this number, subtract your birth year.

Now you see a three-digit number. The first digit is the last digit of your phone number, the next two digits are your actual age! You can use the attached spreadsheet to solve this and find out why it works!!

Maths Quizzes

The origin of the calendar

Magic Square