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Mathematics 12 Online
OpenStudy (anonymous):

Can any tell the cube root of 456533 in just one second orally without calculating or solving ?

OpenStudy (anonymous):

77.

OpenStudy (anonymous):

right bt How did u solve using calculator or by solving ..or orally ?

OpenStudy (anonymous):

What kind of calculator do you have?

OpenStudy (anonymous):

bu using mind We can solve any cube root in just one second

OpenStudy (anonymous):

I'm not sure what you're asking. Do you want to know how to do it with or without a calculator?

OpenStudy (anonymous):

please then cube, 300653

OpenStudy (anonymous):

67

OpenStudy (anonymous):

the cube of 67 is 300763

OpenStudy (anonymous):

No there is condition Cuberoot must be positive integer

OpenStudy (anonymous):

ohh, well isn't that convenient

OpenStudy (anonymous):

the unit value of an integer will map to a definite unit value when cubed: 0-0 1-1 2-8 3-7 4-4 5-5 6-6 7-3 8-2 9-9 so you know half the number off the hop. which ever 10's cube it lay between is your answer

OpenStudy (anonymous):

which is why you guessed wrong when my cube ended in 3

OpenStudy (anonymous):

No the main condition is ..I can tell u cube root of that number which is obtained by multiplying three times a number that lie between 1 to 100 and the number which u r multiplying must be positive Integer !

OpenStudy (anonymous):

you should list those conditions before hand. either way, neat trick

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