If there is a number ending with 5 then it's square can be found easily by the following method. For example lets take the number 135. Then to find its square first replace the ending 5 by 25. Then, multiply the remaining number by its successor.(Here, multiply 13 by its successor, i.e., 14) 135^2=(13 * 14)_25 =182 _ 25=18225

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TopNewestNice observation. Do you know why this is true? – Calvin Lin Staff · 2 years, 1 month ago

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– Akash Gupta · 2 years, 1 month ago

Means?Log in to reply

Do you know how to explain the pattern that you observed? – Calvin Lin Staff · 2 years, 1 month ago

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– Akash Gupta · 1 year, 4 months ago

Ya, I have explained it on my blog. Please refer to it. http://www.brainuser1.blogspot.in/2015/09/square-of-5.htmlLog in to reply

– Akash Gupta · 2 years, 1 month ago

Sorry but I cant explain the reasonLog in to reply