JamesR4494
How do I find the square root of 169?
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ParthKohli
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You can see and tell that it is \(\pm 13\)
Jamierox4ev3r
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just divide 169 by 13 because 13*13 equals 169.
Jack1
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for another way, look up "Newton-Raphson" method... long winded but will work out all square roots for you, eg sqrt 3, sqrt 168
JamesR4494
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How would I find out that it's 13x13?
Jamierox4ev3r
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square roots are just something i memorize
JamesR4494
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Is that the only way? to memorize?
Jamierox4ev3r
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or there is also jack's way, but it is very long winded
JamesR4494
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:c
Jack1
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guesstimating
you know 10^2 = 100, so must be bigger
you know 15^5 = 225, so must be smaller, leaves a range of 4 possibilities
Hunus
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Also, you know that it must end with either a three or a seven. And since you know it has to be greater than 10 and less than 15 your only choice is 13
Jack1
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or you could get a pile of 169 rocks, and see how many even piles of the same number of rocks as piles you can split them in to...?
Jamierox4ev3r
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jack that would take a lot of time lol :)
AonZ
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type in calculator derp?
00015935
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13