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Question

Find the square root of 484 using repeated subtraction.

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Solution

We have subtract odd numbers from the given number.
So, we start with subtracting 1 from 484 which gives us 483.
Now, subtract 3 from 483 which is 480.
The process continues till we get the final answer as 0.
The number of steps for which this operation has been performed will give the square root of the number.
4841=483
4833=480
4805=475
4689=459
45911=448
44813=435
43515=420
42017=403
40319=384
38421=363
36323=340
34025=315
31527=288
28829=259
25931=228
22833=195
19535=160
16037=123
12339=84
8441=43
4343=0
In this case, we had to subtract in 22 steps to get to 0. Hence, root of 484 is 22.

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