FUN WITH MATHS - 1. The Joy of Squaring
Finding out the square of a number, that too if it exceeds two digits is often a tedious task. However, we do not need to worry if the number, containing any number of digits ends with a 5. Here is the reason: There is a trick mentioned in the first sutra of Vedic maths – ‘Ekādhikena Pūrveṇa’ which means ‘one more than the previous one.’ It has many applications, but a very useful one is squaring numbers ending in 5. Till we reach the end of this blog, we shall also derive some other logics using the same trick. Let us take the example – 15 as we know, its square is 225. We shall solve it using the trick. Just combine them without addition, or any other operation . Therefore,(15) 2 =225 In the same way, we can say that, 25 2 = 6 25 , 35 2 = 12 25 etc. Hence, the rule is to simply multiply the number preceeding 5 with its successor and write 25 (i.e. 5²) after it. What if, we are to square a three-digit number? Well, we will use the following steps. Remem