Math, asked by shashwat38, 1 year ago

how to find under root of 225

Answers

Answered by nandini2106

the under root of 225 is 15

to find this try to memorize the squares of the numbers from 1 to 20

Anonymous: suggestion, you can give long square root finding method!!

nandini2106: absolutely correct.......

Jash0809: i know that...

Jash0809: but i was just suggesting a short form

Jash0809: Thank you

Jash0809: it was also correct

Answered by Jash0809

I will help you with a very simple method...
It is applicable to all the numbers ending with 5.
For example let us take 45.
square of 45
in tens digit the number is 4
next number of 4 is 5
4×5 is 20
square of 45 is 2025
similarly we can find the square of any numbers ending with 5.
now square root of 225 :
1×2 is 2 and 25 at the ending
therefore the answer is 15.
Hope this answer helps you.

Jash0809: this is applicable to 3digit numbers also... but only ending with 5

Sneha1812: then how to find the other no.s root?

Jash0809: it can be found by long squaring method

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