Square
If a number is multiplied by itself, the product so obtained is called the square of that number.
The square of a number is a number raised to the power of 2.
Perfect square;
The numbers 1,4,9,16,25,36 are the squares of natural numbers 1,2,3,4,5,6 respectively and are called perfect squares or square numbers. A natural number is called a perfect square or a square number if it is the square of some natural number.
Properties of square numbers:
1. A perfect square is never negative.
2. A square number never ends in 2,3,7 or 8.
3. The number of zeros at the end of a perfect square is always even. e.g.,200*200=40000
4. The square of an even number is always even, e.g. (12)² = 12*12=144
5. The square of an odd number is always odd, e.g. (15)² = 15*15=225
Square root
The square root of a number n is that number which when multiplied by itself gives n as the product.
It is denoted by ' √ '.
If a number is multiplied by itself, the product so obtained is called the square of that number.
The square of a number is a number raised to the power of 2.
Perfect square;
The numbers 1,4,9,16,25,36 are the squares of natural numbers 1,2,3,4,5,6 respectively and are called perfect squares or square numbers. A natural number is called a perfect square or a square number if it is the square of some natural number.
Properties of square numbers:
1. A perfect square is never negative.
2. A square number never ends in 2,3,7 or 8.
3. The number of zeros at the end of a perfect square is always even. e.g.,200*200=40000
4. The square of an even number is always even, e.g. (12)² = 12*12=144
5. The square of an odd number is always odd, e.g. (15)² = 15*15=225
Square root
The square root of a number n is that number which when multiplied by itself gives n as the product.
It is denoted by ' √ '.
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