Here we use elimination method for finding the square root of 1485961

The unit digit of no. 1485961 is 1

We have 4 options 1213, 1219, 1229 and 1239

We get unit digit 1 when we square a no. that ends with 1 or 9. So, option (1) 1213 is eliminated.

Now we take the square of 1220 that is > 1219 and < 1229

⇒ (1220)² = 1488400

This value 1488400 > 1485961, so we can say that 1485961 is the square of 1219.