### Discussion :: Numbers - General Questions (Q.No.15)

Priya P. said: (Nov 30, 2010) | |

Great! |

Nandish said: (Mar 8, 2011) | |

What if 72519*9998 = ... is it 725044962... |

Thimoty said: (Jul 22, 2011) | |

This is a simplest shortcut method for ever. |

Poornima Hassan said: (Aug 31, 2011) | |

725190000 - 72519 ............ 725117481 this is the easiest method dear |

Akshay said: (Feb 19, 2016) | |

So easy method. |

Sree said: (Jul 20, 2016) | |

It is very simple method 72519 * 9999. 72519 * 9000 = 652671000, 72519 * 900 = 65267100, 72519 * 90 = 6526710, 72519 * 9 = 652671. Then 652671000 + 65267100 + 6526710 + 652671 = 725117481. |

Krishnamurthy said: (Aug 19, 2016) | |

The easiest method can be: 72519 x 9999. If the multiplier is series of 9 (i. e. 9, 99, 999. ) then, Add every digit in the given answer (i.e. 7 + 2 + 5 + 1 + 1 + 7 + 4 + 8 + 1 = 36, add the answer again, i.e. 3 + 6 = 9). And if the final answer is 9 then that number itself answers. |

Roshan said: (Jan 16, 2017) | |

I think it's 72446481. Is it correct? |

Vamsi Aripaka said: (May 17, 2018) | |

Thank for explaining the solution. |

Smit said: (Jun 5, 2018) | |

If we multiply all then option C is correct. |

Mustafa said: (Jun 27, 2019) | |

It works if m * n when the numbers in m > n and n = any number of 9's sequence. 1) count number of 9's in n. 2) add those many 0's in the m number. 3) subtract the original number. eg> 72519 * 9999. m=5 , n = 4 thus m>n. 721590000-72519= 725117481. |

Mustafa said: (Jun 27, 2019) | |

This trick always works if m * n when the numbers in m > n and n = any number of 9's sequence. 1) Count number of 9's in n. 2) Add those many 0's in the m number. 3) Subtract the original number. eg> 72519 * 9999. m=5 , n = 4 thus m>n. 721590000-72519= 725117481. |

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