how to find the square of a number from 30-70 easily

<div dir="ltr" style="text-align: left;" trbidi="on"> hi ,<br /> I am prakash back gaon with my second tutorial.<br /> here I am going to make you learn how to find the the square of a number between 30 and 70 easily.<br /> whats in between 30  and 70 ?<br /> its 50 and we are going to take this number as our most important value.<br /> lets see how .<br /> firstly we find the square of 54<br /> guys bring out your calculators and simply do ity using your calculator<br /> you get 2916.<br /> now we use our rule .<br /> how much more is 54 from 50 ---- its 4<br /> so take 25 add four to it for the first two digit<br />  for the send two digits sqaure 4 and place it there<br /> let me show you<br /> <span style="font-family: "Courier New", Courier, monospace;">                      (25+4)(4square)=2916</span><br /> <span style="font-family: "Courier New", Courier, monospace;"><span style="font-family: Arial, Helvetica, sans-serif;">let me take one more example</span> </span><br /> lets us take  59 square<br /> how much more from 50? ans---- 9<br /> so take 25 add 9<br /> then for next two digits square the difference<br /> that's 81<br />                                                     <span style="font-family: "Courier New", Courier, monospace;">(25+9)(9square)=3481</span><br /> thats it.<br /> now for a number lower that 50<br /> take 47 . how much less than 50? thats 3<br /> do just the opposite for 1st two digit means subract from 25<br /> we get 22<br /> the process for next two digits remain same thats square the number .<br />                                                     <span style="font-family: "Courier New", Courier, monospace;">(25-3)(3 square)=2209</span><br /> <span style="font-family: "Courier New", Courier, monospace;"><span style="font-family: Arial,Helvetica,sans-serif;">if you take 61 you will get  </span>121 <span style="font-family: Arial, Helvetica, sans-serif;">as the last two values and 36 as first two. but we can only have 4 digits so add one to 36 and make 37</span></span><br /> <span style="font-family: "Courier New", Courier, monospace;"><span style="font-family: Arial, Helvetica, sans-serif;"> that means you get 3721</span></span><br /> <span style="font-family: "Courier New", Courier, monospace;"><span style="font-family: Arial, Helvetica, sans-serif;">any questions? use comments box </span></span><br /> <br /> .<br /> <br /> <br /> <br /></div>

how to find the square of a number from 30-70 easily

hi , I am prakash back gaon with my second tutorial. here I am going to make you learn how to find the the square of a number between 30 ...

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