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<p>[QUOTE=&quot;proofartoncircs, post: 927589, member: 25952&quot;]&lt;&lt;A calculator might be a necessity today, but how many can do square root in longhand like we were taught ?&gt;&gt;</p><p>&nbsp;</p><p>I have forgotton how. But there are many ways around it.</p><p>1) use a calculator.</p><p>2) if the calculator does not have square root, divide the number by 1 and average your divisor and the result. repeat with the new numbers until divisor and result match.</p><p>3) use logarithms</p><p>4) use a slide rule</p><p>&nbsp;</p><p>On a test in my adult life I was asked to calculate the square root of 144 in radix 12 arithmatic. I proved the square root of 144 was 12 in any system.</p><p>144 = radix squared + 4 radix + 4 = (radix + 2) (radix + 2) = 144.</p><p>I only got partial credit.[/QUOTE]</p><p><br /></p>

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