1.

Find the cube of 64.1. 2621442. 2641643. 2638544. 2701445. None of these.

Answer» Correct Answer - Option 1 : 262144

Concept used:-

Trick for writing cube of a number.

Method & Calculation:-

  • Write the cube of 6 & 4 in three digit form i.e. (216064)
  • Now multiply all the digits within themselves i.e. (6 x 4) = 64
  • Now multiply the result obtained from step (2) by 3 i.e. 64 x 3 = 192
  • Now multiply 192 and 64 i.e. 192 x 64 = 1228
  • Now keep the unit digit vacant and add 216064 & 12288 i.e. 216064 + 12288_ = 262144

 



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