Tuesday, 15 October 2013

Math-Mard Trick

Before the arrival of the participant, place cards 1 (Ace), 2, 4, 5, 7,  8 on the table.
You may need a calculator.

Ask the participant to choose any card.
In the video we chose # 4.
Follow these instructions:
Multiply the number by 9.
Multiply the answer by 111.
Multiply the answer by 1001. 
Divide the answer by 7. 

Question :
Will each card match a different digit of your answer?

Shuffle the cards. Turn them over one at a time. Find out.

PS: Notice the card sorting dyslexia..:-)

Monday, 18 March 2013

Did you know that...28 facts to enrich ur brain.....



  1. π=3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679 82148 08651 32823 ...
  2. A sphere has two sides. However, there are one-sided surfaces.
  3. There are shapes of constant width other than the circle. One can even drill square holes.
  4. There are just five regular polyhedra
  5. In a group of 23 people, at least two have the same birthday with the probability greater than 1/2
  6. Everything you can do with a ruler and a compass you can do with the compass alone
  7. Among all shapes with the same perimeter a circle has the largest area.
  8. There are curves that fill a plane without holes
  9. Much as with people, there are irrational, perfect, complex numbers
  10. As in philosophy, there are transcendental numbers
  11. As in the art, there are imaginary and surreal numbers
  12. A straight line has dimension 1, a plane - 2. Fractals have mostly fractional dimension
  13. You are wrong if you think Mathematics is not fun
  14. Mathematics studies neighborhoods, groups and free groups, rings, ideals, holes, poles andremovable poles, trees, growth ...
  15. Mathematics also studies models, shapes, curves, cardinals, similarity, consistency, completeness,space ...
  16. Among objects of mathematical study are heredity, continuity, jumps, infinity, infinitesimals,paradoxes...
  17. Last but not the least, Mathematics studies stability, projections and values, values are oftenabsolute but may also be extreme, local or global.
  18. Trigonometry aside, Mathematics comprises fields like Game Theory, Braids Theory, Knot Theoryand more
  19. One is morally obligated not to do anything impossible
  20. Some numbers are square, yet others are triangular
  21. The next sentence is true but you must not believe it
  22. The previous sentence was false
  23. 12+3-4+5+67+8+9=100 and there exists at least one other representation of 100 with 9 digits in the right order and math operations in between
  24. One can cut a pie into 8 pieces with three movements
  25. Program=Algorithms+Data Structures
  26. There is something the dead eat but if the living eat it, they die.
  27. A clock never showing right time might be preferable to the one showing right time twice a day
  28. Among all shapes with the same area circle has the shortest perimeter

Friday, 15 March 2013

How to succeed in maths.......


Step 1: Hard work trumps natural talent.
As in most everything, the people who are most successful in math are the ones who work the hardest--not those with "natural talent."   In school, those who work hard get better grades in math than the "smart'' students who just coast.  Most aspects of mathematics can only be learned by hard practice.  This holds true whether you want to develop your problem solving abilities or your computational skills.  No one thinks they can run a marathon by using only their natural talent, but there are lots of people with no talent for running who have worked hard and have successfully completed many marathons.
Step 2: Keep an open mind.
In math almost everything you learn is useful, even if you can't see it right away.  All the formulas, theorems, ideas, proofs, and problems you study in high school and college are connected to lots of real world applications, even if you don't see them now.    And more importantly, even if you think you'll never use the specific things you are studying, they help develop your mind and make it easier for you to solve other problems later--the problems you really care about.   It's like boxing: training programs for boxers often involve lots of jumping rope.  A boxer might complain "When am I ever going to use this? I am never going to jump rope in a match."   But jumping rope makes them better boxers, even though the boxers never actually jump rope while fighting.   The math you are learning is much more useful than jumping rope; but even if you never use it in your daily life yet, it makes you smarter.  That is the most important reason to study it.
Step 3: Find the reasons--don't just memorize.
Mathematics is not just a long list of random formulas that someone invented out of nowhere.  Math works because it is true--there is a reason for every step, every rule, and every part of every formula.  Don't just memorize the formulas and the rules.  Find out where they came from, why they work, and what they mean.  It may sound like more work to do this, but if you try it, you will quickly find that understanding the reasons and the meaning actually makes everything easier.
Step 4: Never give up.
Math is hard.  Anyone who says otherwise is lying.  But you can do it anyway.  If you want to be good at anything, you have to stick with it, even when you feel like quitting.  You gain the most when you finally figure out a problem after a long struggle.  That's how you get smarter.  But you'll get nowhere if you give up whenever a problem is confusing or when you can't solve it right away.
Athletes know that working, fighting, against something that is hard makes you stronger.  The same goes for your brain--getting the right answer quickly won't make you smarter, but fighting with a hard problem for a long time will.
Step 5: Learn to read the textbook.
Math books are not like other books--they pack a lot of information into a small space.  One page might take you an hour to really understand well.  That is not because the books are poorly written--it is because it takes time to absorb the information, and you have to think carefully about every line.  You even have to think a lot about the pictures.
Most people who try to read math books get frustrated and give up--they expect the math book to be as easy to read as their favorite novel.  But if you slow down and really think about what is happening in each step, you will find that your book is like a personal tutor.  Most books have lots of examples and explain things in several different ways.  Most of them are written by someone who has been teaching for a long time and knows how to help you with the confusing parts.  Once you get the hang of reading them, they can make learning math a lot easier.
The one thing a book can't do is answer questions.  The great secret is read the book before you go to class.  Then you can ask the teacher about all the things that didn't make sense in the book.  Most people only try to read the book after class, when they didn't understand some part of what the teacher was saying.  But then if you have a question, you're stuck--you can't ask your questions because the teacher is gone.
Step 6: Talk to your teacher.
Professors and teachers want to help you.  Get to know them.  Go to them for help--they love to talk to students who want to learn.   Go to them to get help finding the right classes, to get help with homework (even for a class they are not teaching), and just to discuss life.  They can help you with your math, and they can help you avoid the mistakes they made when they were students.
Step 7: Look for the beauty.
Math is extremely useful, but it is also beautiful.  It connects lots of different ideas into one.  It explains important things that cannot be understood in any other way.  When you finally get it, it is exciting to see how things fit together, why things work, how it all makes sense.   Enjoy the experience of opening your mind.

facts about 2013.......


1. 2013 is composed of four different digits, and is the first such year since 1987.
2. 2013 is composed of four sequential digits, although obviously not in order. The last such year was nearly 600 years ago, back in 1432. But the next such year is only 18 years away.
3. 2013, 2014, and 2015 are consecutive years each of which is the product of three distinct primes (3 x 11 x 61, 2 x 19 x 53, and 5 x 13 x 31, respectively). The last such three-year sequence was back in 1885-1887, and the next one isn’t until 2665-2667.
4. As was 2012, 2013 is one of only 45 multi-digit numbers that, when spelled out in English, are alliterative (i.e., “two thousand thirteen”)

Tuesday, 12 March 2013

computational biologist


A computational biologist applies the techniques of computer science, applied mathematics and statistics to address biological problems. His/her main focus lies on developing mathematical modeling and computational simulation techniques. By these means it addresses scientific research topics without a laboratory.
Low-end Salary: 
 $45,000/yr
Median Salary: 
 $83,000/yr
High-end Salary: 
 $150,000/yr
EDUCATION: 
Until recently, there were no formal educational opportunities in computational biology at the graduate level. Therefore, most of the current practitioners and authorities in the field have a combination of degrees at the graduate (master's or doctorate) and undergraduate levels in mathematics, computer science, and biology.
MATH REQUIRED: 
College Algebra Trigonometry Calculus I and II Linear Algebra Numerical Analysis and Differential Equations Probability and Statistics
WHEN MATH IS USED: 
Computational biologists use math as they apply algorithms and statistical techniques to the interpretation, classification and understanding of biological data. These typically consist of large numbers of DNA, RNA, or protein sequences. They also are concerned with building computational models of biological systems and mathematically modeling the behavior or molecules.
POTENTIAL EMPLOYERS: 
Highly qualified individuals are in demand at academic, private, and government research institutes alike.
FACTS: 
The International Society for Computational Biology (ISCB) is an organization for computational biologists and it serves over 2500 members from nearly 70 countries around the world.

Mathematical biophysicists.......


Have biology but don't want to leave maths then this job is for you.........
Low-end Salary: 
 $34,392/yr Mathematical biophysicists develop theories and methods of the physical sciences for the investigation of biological systems.
Median Salary: 
 $93,270/yr
High-end Salary: 
 $113,068/yr
EDUCATION: 
A Ph.D. degree usually is required for independent research, but a master’s degree is sufficient for some jobs in applied research or product development.
MATH REQUIRED: 
College Algebra Trigonometry Calculus I and II Linear Algebra
WHEN MATH IS USED: 
Mathematical biophysicists use math as they apply models and experimental techniques to larger systems such as tissues, organs, populations, and ecosystems. Scientists in this field conduct research concerned with understanding the interactions between the various systems of a cell, including the interactions between DNA, RNA and protein biosynthesis.
POTENTIAL EMPLOYERS: 
About 39 percent of all biological scientists were employed by Federal, State, and local governments. Federal biological scientists work mainly for the U.S. Departments of Agriculture, Interior, and Defense and for the National Institutes of Health. Most of the rest work in scientific research and testing laboratories, the pharmaceutical and medicine manufacturing industry, or colleges and universities.
                                                                         -source internet.

Saturday, 9 March 2013

Mӧbius band.....

Mӧbius band   Image (also called Mӧbius strip) is a one-sided surface that can be obtained by gluing two ends of a half-twisted long rectangular strip. They look cool in M.C. Escher’s drawings and in real life:

Mӧbius bands were independently discovered by German mathematician Johann Listing and German scholar August Ferdinand Mӧbius in the 1850s. Some interesting things about these shapes are as follows:
  • If you draw a line down the middle of the strip, you will eventually reach the starting point after drawing on what appears to be both sides of the strip – proving that there really is only one side.
  • By tracing one’s finger along the edge of a Mobius band, every possible point on the edge of the object will be touched – proving that the surface has only one edge.
  • It is impossible to cut a Mobius band in half. If you cut a Mobius band along the centerline, you will end up with one long strip with two full twists, rather than two separate strips.
  • The B.F. Goodrich Company utilized Mӧbius-like shapes to design conveyor belts. Because the “wear and tear” was distributed throughout the entire shape, these belts lasted twice as long as conventional belts.
  • Mobius bands have been in the design of electronic resistors, compact resonators and superconductors for complex electrotechnology applications.
After years of searching for examples in natural materials, U.S. Department of Energy scientists have recently discovered Möbius-like shapes occurring in metamaterials – that is, materials engineered from artificial “atoms” and “molecules”. This is big news for scientists who want to create structures with shapes that aren’t naturally occurring in materials or molecules, and up to this point were limited to only mathematical imagination.
aint it cool?????????