What is the squared root of 1444?

1 Answer
KillerBunny
Oct 30, 2015

#38#

Explanation:

If you can use a calculator, of course you only have to ask it, and you'll have your answer. If you can't, you must go by trial and errors, keeping in mind that you're looking for a number whose square is #1444#.

Since it's easy to remember, or to compute, that #30^2=900#, our number will surely be greater than #30#. Also, you don't need to check all the numbers: if a square of a number ends up with #4#, the number can end only with #2# or #8#. So, I tried #32^2# and #38^2#, and I found out that #38# was the right number.

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