The square of a number is that number raised to the power

If a number multiplying by itself then the obtained number is called ____ of the number. 

A perfect square never ends with the digit

The Division algorithm is

If 'a' is divided by 'b' where 'q' is the quotient and 'r' is the remainder then $a=bq+ra=bq\; +r$. Here, remainder 'r' satisfies the condition

For every natural number n, the difference of square of two consecutive natural numbers is equal to the

The square of an odd natural number is

A triplet (m, n, p) of three natural numbers m, n and p is called a Pythagorean triplet if

The formula for $n^{th}n^\{th\}$ triangular number is

The square root of an even square number is