What is Cube Root in Maths
Maths Questions Answers
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Class - VIII - Maths:- INDEX
1. Squares & Square Roots2. Cubes & Cube Roots
3. Exponents & Radicals
4. Profit Loss & Discount
5. Compound Interest
6. Algebraic Identities
7. Polynomials
8. Linear Equations
9. Parallel Lines
10. Types of Quadrilaterals
11. Construction of Quadrilaterals
12. Circles
13. Areas
14. Surface Areas
15. Volumes
16. Statistics
Class - VIII - Maths
Note : The Cube roots pattern method is not suitable for big numbers. However the results achieved by it are always correct.
The Cube Roots through a pattern
You will notice that the cube roots follow the pattern shown in figure. Now take any number and subtract 1,7,19,37 .. one by one till you get '0'. The no of subtractions you have done is the cube root.
Question - Type 9 - Find the cube roots of 64 & 216 by cube pattern
Answer - 9- (A) for 64 Subtract 1,7,19,37.. in a sequence
(1) 64-1=63
(2) 63-7=56
(3) 46-19=37
(4) 37-37=0 -- 4 steps Therefore the cube root is '4'
(B) for 216 Subtract 1,7,19,37.. in a sequence
(1) 216-1=215
(2) 215-7=208
(3) 208-19=189
(4) 189-37=152
(5) 152-61=91
(6) 91-91=0 -- 6 steps Therefore the cube root is '6'
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What is a Cube Root (Page 7/7)
(Contiued from page 6 )Note : The Cube roots pattern method is not suitable for big numbers. However the results achieved by it are always correct.
The Cube Roots through a patternYou will notice that the cube roots follow the pattern shown in figure. Now take any number and subtract 1,7,19,37 .. one by one till you get '0'. The no of subtractions you have done is the cube root.
Question - Type 9 - Find the cube roots of 64 & 216 by cube pattern
Answer - 9- (A) for 64 Subtract 1,7,19,37.. in a sequence
(1) 64-1=63
(2) 63-7=56
(3) 46-19=37
(4) 37-37=0 -- 4 steps Therefore the cube root is '4'
(B) for 216 Subtract 1,7,19,37.. in a sequence
(1) 216-1=215
(2) 215-7=208
(3) 208-19=189
(4) 189-37=152
(5) 152-61=91
(6) 91-91=0 -- 6 steps Therefore the cube root is '6'
© funandhobby.com ( What is a Cube Root)