mathematics tricks and fun

  Number NINE Number Nine is a peculiar and interesting number which is attributed different names in mathematics literature.Moreover it is a number which is equally valued  by all religions and  numerology,astrology, as well. 9 is natural number lying between numbers 8 and 10 It is the highest single  digit number in the base 10 system .This is a composite number its divisors  being 1 and 3 .  3 x 3  is 9 and so the third square num ber. It is the first  composite number and first composite odd number and also single digit  composite odd number. A polygon of 9 sides is called nonagon or  ennaegon. Group of nine of anything is called ennead. If any natural number is multiplied by 9, then its  digital sum is always nine.  This method of finding  digital sum and casting out nines is a quick way  of testing calculations of sums,differences,multiplications,divisions. This is known ever since 12th century.  Wh...

FIBONACCI SEQUENCE    Fibonacci was an  Italian mathematician real name was Leonardo Da Pisa 11 – – 23 is celebrated every year as Fibonacci Day. This is a sequence of numbers which you get by adding together last two umbers - 1 1 2 3 5 8 13  21 and so on . Fibonacci numbers are related to natural phenomena  and based on this  Keplars Golden ratio was derived. Kepler's law became famous after Newton derived Kepler's law through the application of Galileos findings in dynamics. This led to the origin of classical mechanics from which  modern day physics sprang up.it is noticed that the Petal arrangement in some flowers and leaf arrangement in certain plants follow the pattern as described by fibonacci sequence (Cook1979) Fibonacci number in pine cone received great attention Fibonacci sequence also in the spiral of snail shell and some shells in the sea Cook in 1979 said  the spirals or helical mass maybe the core of life principles that o...