1.

Find the cube root of 13824?1. 342. 263. 244. 365. 32

Answer» Correct Answer - Option 3 : 24

Given:

The given number = 13824

Concept:

Calculation skills trick

Calculation:

Step(1):

First, we will take the digit at the unit’s place.

At the unit place, we have 4.

Step(2):

Now consider the cube table, the cube of which number has 4 as at the unit digit place.

We see, 4 × 4 × 4 = 64.

Step(3):

That means the cube root of 13824 will have 4 at the unit place.

Step(4):

Now ignore the last 3 digits of 13824, i.e. 824

Step(5):

Taking 59 as a reference number, we can see from the cubes table 13 lies between cubes of 2 and 3.

Step(6): Here, we choose the lower number i.e. 2

∴ We get the two digit of the answer

∴ Cube root of 13824 = 24


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