List of top Mathematics Questions on Square Roots of Decimals asked in CBSE Class VIII

Find the number of digits in the square root of each of the following numbers (without any calculation). 

1. 64 
2. 144 
3.  4489 
4.  27225
5.  390625

Find the least number which must be subtracted from each of the following numbers so as to get a perfect square. Also find the square root of the perfect square so obtained. 

1. 402 
2.  1989 
3.  3250 
4.  825 
5.  4000

Find the length of the side of a square whose area is \(441 \;m^2\)

Find the square root of the following decimal numbers. 

1.  2.56 
2.  7.29 
3.  51.84 
4.  42.25 
5.  31.36

Find the square root of each of the following numbers by division method. 

1. 2304 
2. 4489 
3.  3481 
4.  529 
5.  3249 
6.  1369 
7.  5776 
8.  7921 
9.  576 
10.  1024 
11.  3136 
12.  900

Find the least number which must be added to each of the following numbers so as to get a perfect square. Also find the square root of the perfect square so obtained. 

1. 525 
2.  1750 
3.  252 
4.  1825
5.  6412

In a right triangle ABC, \(∠ B\) = 90°. 

1. If AB = 6 cm, BC = 8 cm, find AC 
2.  If AC = 13 cm, BC = 5 cm, find AB

A gardener has \(1000\) plants. He wants to plant these in such a way that the number of rows and the number of columns remain same. Find the minimum number of plants he needs more for this.

These are \(500\) children in a school. For a P.T. drill they have to stand in such a manner that the number of rows is equal to number of columns. How many children would be left out in this arrangement?