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