Answer:Mathematics NCERT Grade 8, Chapter 6: Squares and Square roots- Numbers like 1, 4, 16, 36 are known as square numbers.

If a natural number m can be expressed as n2 , where N is also a natural number, then m is a square number.

Properties of square numbers are explained in this chapter.

If a number has 1 or 9 in its UNITS place, then its square ends in 1.

When a square number ends in 6, then its square root will have 4 or 6 in its unit's place.

Square numbers can only have even number of zeroes at the end.

Some interesting patterns discussed in this chapter are:

a. Adding triangular numbers

b. Numbers between squares: There are 2n non-perfect square numbers between the squares of the numbers n and (n + 1)

c. Adding odd numbers: If a natural number cannot be expressed as a SUM of successive odd natural numbers starting with 1, then it is not a perfect square.

d. A sum of CONSECUTIVE natural numbers

e. Product of two consecutive even or odd natural numbers

Step-by-step explanation: