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Find out the cube of 99?
1. 129529
2. 970299
3. 917099
4. 117649
5. 124789

1 Answer

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Best answer
Correct Answer - Option 2 : 970299

Given:

The given number = 99

Concept:

Calculation skills trick

Calculation:

Step(1):

Write down the cube of each of the digits in three digit format i.e. 93 = 729 and 93 = 729

The number obtained after this step is 729729.

Step(2):

Now multiply all the digit of the given number with themselves i.e. (9 × 9) = 81

Step(3):

Multiply the result obtained in Step(2) by the power 3 i.e. (81 × 3) = 243

Step(4):

Now multiply the result obtained in Step(3) with the given number i.e. (99 × 243) = 24057

Step(5):

Add the number obtained in Step(1) with the number obtained in Step(4) keeping the unit place empty i.e.

7 2 9 7 2 9

2 4 0 5 7 _

9 7 0 2 9 9

∴ Cube of 99 = 970299

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