1.

Find the cube of 32.1. 315982. 320883. 335884. 327685. None of these.

Answer» Correct Answer - Option 4 : 32768

Concept used:-

Trick for writing cube of a number.

Method & Calculation:-

  • Write the cube of 3 & 2 in three digit form i.e. (027008)
  • Now multiply all the digits within themselves i.e. (3 x 2) = 6
  • Now multiply the result obtained from step (2) by 3 i.e. 6 x 3 = 18
  • Now multiply 18 and 32 i.e. 18 x 32 = 576
  • Now keep the unit digit vacant and add 027008 & 576 i.e. 027008 + 576_ = 32768


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