Square Root of Non-Perfect Squares - Shortcut

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Shortcuts to do calculations mentally, useful for developing numerical aptitude and for success in competitive examinations
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square root of 531
ans:- square root of (400+131)
20 + 131

20*2
20+3.27
23.27
calculator ans is 23.0434
how to choose option if it come so much difference!!
plz let me know sir.

suhailsk
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Seems very complicated sir, but it's actually quite simple. SR 10 =3 with 1/(3x2) remaining which is about 3.16 (100/6=16)

tonybarfridge
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Thank you so much sir
It's very helpful

vijayakumari
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Really ur super sir, daily ur uploading videos sir tq sir

kommojuharesh
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Sir I'm not getting any live notification

nandakumars