Question

4.1 Determine between which two whole numbers lies square root of 20

Answer 1

The square root of 20 is between 4 and 5.

Whole Numbers

They are the numbers represented by positive real numbers where the fractions and decimal numbers are not included.

For solving this question, you should list the whole numbers whose your square is less than 30. Your list must present the following numbers:

0 ⇒ 0²=0

1 ⇒ 1²=1

2 ⇒ 2²=4

3 ⇒3²=9

4 ⇒ 4²=16

5 ⇒ 5²=25

Note that 6²=36, it is greater than 30,because of this it is not in the previous list.

The question asks to determine between which two whole numbers lies the square root of 20. Therefore, from the previous list, it is possible to see that the value 20 is between 16 and 25. The square root of 16 and 25 is equal to 4 and 5, respectively.

Thus, the square root of 20 is between 4 and 5. You can check this results in your calculator:$\sqrt{20}=2\sqrt{5}=4.47$

Learn more about the square root here:

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