Question

Which of the following is not a perfect cube. *



216

1000

243

125

​

Answer 1

Answer:

243

Step-by-step explanation:

because 7 cube is 343

not 243

Answer 2

Step-by-step explanation:

Here,

$\sqrt[3]{216}$ = $\sqrt[3]{6*6*6 }$= 6

$\sqrt[3]{1000}$ = $\sqrt[3]{10*10*10}$ = 10

$\sqrt[3]{243}$ =  $\sqrt[3]{3*3*3*3*3}$ = 3 $\sqrt[3]{9}$

$\sqrt[3]{125}$ = $\sqrt[3]{5*5*5}$ = 5

Since, cube root of 243 is 3$\sqrt[3]{9}$ which is not a perfect cube root.

Hence, 243 is not a perfect cube. (Ans)