Finding Square of a Number ending with 5 Lets learn how to find the square of numbers ending in 5 using Vedic Mathematics: The square of any number ending in 5, (like 15, 25, 1055 etc.,) in the form of ‘a5’ , can be written as n25 where n is a * (a + 1)). So, a5^2 = n25 where n = a*(a+1). Let’s try this with some examples. Example: 1 35^2. Here a = 3. The answer will be n25 where n = a*(a+1) = 3*(3+1) = 12; The answer is 1225 Example: 2 Let’s take a bigger number this time. 155^2. Here a = 15, n = 15*16 = 240. Hence the answer is 24025. Example: 3 Now let’s do one more time with an even bigger number. 1005^2 . a = 100, n=100*101 = 10100. Hence the answer is 1010025. Isn’t it cool?. Just with this example, you will save over 1 minute and that could potentially make a huge difference. Take some more examples to get a better grip on this method. And dont forget to drop your comments below. Thanks |
AuthorA Math Lover!! I have trained students who used to fear from Maths and now are active participant in the Math Contest conducted all around the world Archives
September 2016
Categories |