How to calculate the square root of any number? I am Anil Kumar and I will show you a technique for calculating the square root of any number without a calculator. So, the key here is that we are doing this without a calculator. This is a technique that we learned a long time ago, and I'm happy to share it with you. Let's try to find the square root of 200. To find the square root of 200, we can use a special kind of division. We start with pairs of numbers from left to right. So, we have 2 and 0 as pairs, and then we are left with just 1. Now, we will try to divide the numbers from the right, which is 1. We know that 1 times 1 is 1, so we place that as a divisor and as a quotient. 2 times 2 is 4, but since we only have the number 2, we can divide by 1. Therefore, we put 1 as the divisor and 1 as the quotient. Then, we take away 1 from 2, which gives us 1. Now, we bring down both numbers together, so we have 100. We again have to divide, and this time, we write the number which is twice the quotient. 2 times 1 is 2, so we write 2 as the divisor. Next, we have to fill in another number that can be multiplied by itself to get closer to 100. We can say that 10 can be divided by 2, 5 times. However, 5 times 5 will be 25, which is much bigger. So, let's try the number 4 instead. We place 4 here and also as the divisor, since the technique requires the same number in both places. 4 times 4 is 16, so we...