The square root of a number is a value that, when multiplied by itself, gives the original number. The symbol for the square root is √.

For example, the square root of 25 is 5, because 5 multiplied by 5 equals 25.

The square root of a number can be calculated using a calculator, or by using long division. For example, to find the square root of 36:

• Divide 36 by 2, which gives 18.
• Divide 36 by 18, which gives 2.
• Average 2 and 18, which gives (2 + 18)/2 = 10.
• Divide 36 by 10, which gives 3.6.
• Average 10 and 3.6, which gives (10 + 3.6)/2 = 6.8.
• Repeat steps 4 and 5 until you get a desired level of accuracy.

Therefore, the square root of 36 is approximately 6.