Question

Find the odd number out of the series : 8, 27, 64, 100, 125, 216, 343 a. 27 b. 100 c. 125 d. 216

Answer 1

answer is (b) 100
as its not a cube of any number

Answer 2

The required option is "b . 100".

Step-by-step explanation:

The given sequence are:

8, 27, 64, 100, 125, 216, 343

The pattern follow:

The number is perfect cube.

$8=\sqrt[3]{8} =2$

$27=\sqrt[3]{27} =3$

$64=\sqrt[3]{64} =4$

$100=\sqrt[3]{100}$, is not a perfect cube.

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

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

$343=\sqrt[3]{343} =7$

Clearly, except 100 all numbers are perfect cube.

Thus, the required option is "b . 100".