Find out the square root of 6724?1. 882. 623. 824. 725. 81

1.	Find out the square root of 6724?1. 882. 623. 824. 725. 81
Answer» Correct Answer - Option 3 : 82 The given number = 6724 Concept: Calculation skills trick Calculation: Step(1): The unit digit in this number is 4, which can be a unit digit of its square root number such as 2 or 4. Because 2 x 2 is 4 and 8 x 8 is 64. Step(2): Now let us consider the first two digits that is 67 which comes between the squares of 8 and 9 because 64 < 67 < 81 Step(3): We can assume that the ten’s digit of the square root of 6724 is the lowest among the two numbers i.e. 8 Step(4): Now, we need to find among 82 and 84 which is the square root of 6724. Step(5): Since the ten’s digit is 8 and the next number is 9, we need to multiply both the numbers like 8 x 9 = 72 and since 72 is greater than 67. Step(6): Square root of 6724 will be the smaller number among 82 and 88 i.e. 82. ∴ √6724 = 82

Answer» Correct Answer - Option 3 : 82

The given number = 6724

Concept:

Calculation skills trick

Calculation:

Step(1):

The unit digit in this number is 4, which can be a unit digit of its square root number such as 2 or 4. Because 2 x 2 is 4 and 8 x 8 is 64.

Step(2):

Now let us consider the first two digits that is 67 which comes between the squares of 8 and 9 because 64 < 67 < 81

Step(3):

We can assume that the ten’s digit of the square root of 6724 is the lowest among the two numbers i.e. 8

Step(4):

Now, we need to find among 82 and 84 which is the square root of 6724.

Step(5):

Since the ten’s digit is 8 and the next number is 9, we need to multiply both the numbers like 8 x 9 = 72 and since 72 is greater than 67.

Step(6):

Square root of 6724 will be the smaller number among 82 and 88 i.e. 82.

∴ √6724 = 82

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