## Shashank_ 2 years ago Can any tell the cube root of 456533 in just one second orally without calculating or solving ?

1. Phydeaux

77.

2. Shashank_

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

3. Phydeaux

What kind of calculator do you have?

4. Shashank_

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

5. Phydeaux

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

6. Mathmuse

7. Shashank_

67

8. Mathmuse

the cube of 67 is 300763

9. Shashank_

No there is condition Cuberoot must be positive integer

10. Mathmuse

ohh, well isn't that convenient

11. Mathmuse

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

12. Mathmuse

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

13. Shashank_

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 !

14. Mathmuse

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