mathematics tricks and fun

       11th Lesson of  mathematics tricks and fun       Hello friends ,today we are going to stud y Nikhilam Sutra in multiplication. I am Dr Prema b sejekan.  Nikhilam Sutra says Nikhilam Navatascharamam Dasatah.Means All from Nine and Last from Ten . Nikhilam sutra has upasutras corollaries and sub-corollaries.All of them and their application  in multiplication will be discussed here.  Here  applications of Nikhilam Sutra in general is shown.Let us take the first among the 7 examples. In this, the first question is  9 times 9.working base is 10 . So complement of 9 from 10 is 1.   1×1 is 1 and  9-1 is 8. The answer is 81.2nd example is 7× 6 , so complement of  7 from 10 is 3. Complement of 6 is 4 so we will write 7-3× by 6-4 so ,3×4 is 12 and 7-4,is 3 .Adding the carry overs answer is 42.  Rest all examples are with different bases ie  100,1000 base  done in the similar way. ...

Lesson 4. mathematics Tricks and Fun -multiplicayion with 9  of numbers with digits in random(English Hindi,Malayalam Hello friends,welcome to the 4th lesson of mathematics tricks and fun. I am Dr Prema B Sejekan. Today we are going to study the multiplication of nines with numbers having digits in random. In the first example 776 is multiplied by 999 How to do this quickly. 999 means one less than 1000 .So first multiply with 1000 and deduct once 776 from the product ..By practice you will be able to deduct 1 from 776 and subtract quickly 776 from 1000 and write the answer. In the second example, the multiplicand has five digits and only four nines on multiplier side. In such calculations,if you practice what I have taught now, you won't make mistakes. .The answer is Here in the first example , we have to find the square of 998 .We will do this by Nikhilam sutra. multiply straight and add or subtract cross wise accordingly. Here first find the base Since 998 is near 1000...