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Find the cube root of 531441.1. 812. 913. 714. 895. None of these. |
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Answer» Correct Answer - Option 1 : 81 Concept used:- Trick to find cube root of a number. Method and Calculation:- • Find the unit digit of cube root by looking at unit digit of given number. For cube root of 531441, unit digit must be 1 (13 is 1) • Find other digit(s) by ignoring the last three digits of number and looking at remaining digits. 512 < 531 < 729 (512 and 729 are cubes of 8 and 9, so remaining part of cube root will be 8) Hence, 81 is our answer. |
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