Saturday 3 September 2011

Famous Mathematicians / Aryabhatta

Aryabhatta

476 BC-550 BC India

                                                         
Aryabhata was the first astronomer to make an attempt at measuring the Earth's circumference since Eratosthenes (circa 200 BC). Aryabhata accurately calculated the Earth's circumference as 24,835 miles, which was only 0.2% smaller than the actual value of 24,902 miles. This approximation remained the most accurate for over a thousand years.
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Friday 2 September 2011

What is Neo cube ? is it safe for Kids ?



Neo Cube Toys 







Neo Cube is a group of powerful magnetized 216 balls (neodynum magnets) that can be made into any 3D or 2D shape you want. This is perfect as a present for anyone who loves solving puzzles.

There are infinitely many shapes that can be created. Once you start expressing your idea, you can spend hours of time fixing and upgrading until you are satisfied.

What is Neodynum Magnet ?
A neodymium magnet (also known as NdFeB, NIB, or Neo magnet), the most widely-used type of rare-earth magnet, is a permanent magnet made from analloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. Developed in 1982 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of permanent magnet made.
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Power Point Presentations in Physics Chemistry

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Famous Mathematicians /Srinivasa Ramamnujan


22 December 1887 -26 April 1920 (aged 32) Chetput, (Madras), India
       Ramanujan Number/Hardy-Ramanujan Number
A common anecdote about Ramanujan relates to the number 1729. Hardy arrived at Ramanujan's residence in a cab numbered 1729. Hardy commented that the number 1729 seemed to be uninteresting. Ramanujan is said to have stated on the spot that it was actually a very interesting number mathematically, being the smallest natural number representable in two different ways as a sum of two cubes:
1729 = 13 + 123 = 93 + 103
91 = 63 + (−5)3 = 43 + 33  (91 is divisor of 1729)
Masahiko Fujiwara showed that 1729 is
1 + 7 + 2 + 9 = 19
19 × 91 = 1729
Ramanujan Known for : Landau-Ramanujan Constant
                                            Mock theta functions
                                 Ramanujan Prime
                                 Ramanujan's Sum
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