multiplication by all 9's

Multiplication by all 9's wherein multiplicant being of equal no. of digits as of multiplier. Solved eg below.

2148 * 9999 = 21477852 - This is solved just in fraction of seconds... How????

Reduce the number 2148 by 1 (2147) which is left part of answer. For next 4 digits write the complementary numbers from 9 in the same order of 2147 i.e 7852 ( i.e 9-2, 9-1, 9-4 & 9-7)


  • Neha
    Thats great!!!

    Looking forward for some more.

You are reading an archived discussion.

Related Posts

hi , let us make thread , to share our job opening s ,,here , please co operate me
sharique,glad to be in between u:myparty:
Well as required here goes my Intro 😁 Name: Paritosh Engineering Trade: Computer Science Occupation: Student & Working:- Working with a major software firm and doing MS in Softwares from...
Google,Yahoo,MSN..the most surfed sites when it comes to search something whether search for the details of new gadget in the market or for a CE-puzzle in which its specially mentioned...
I watched a show on Beggar Mafiah on some Media Channel..I have heard a lot of times about it but still when I see any beggar, I can't resist myself...