Any two digit multiplication trick

. Friday, September 5, 2008
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I am back again with a new trick. Its about multiplying any 2 digits with any number of digits. 


123 x 24 =

                                  1    2     3
                                  x    2     4
                                 -------------
                                   2  9  5  2  
                                 -------------

Note : The way I have solved this problem here you can solve it the similar way on your notebook. Yes, in just 3 lines (first two lines for question and 3r one for answer). The only prerequesite for learning this trick is to know tables from 1-9. It should be feeded in memory very perfectly such that as you see 9 and 8 answer 72 should suddenly click in your mind without any delay. If you see 9 and 8 and than think on what 9 x 8 = is than it will be a waste of seconds and remember saving SECOND'S is very essential for becoming successfull. For instance, this trick is of immence help to those who are or want to prepare for CAT or other competetive exams.

Let us learn the trick now
  • Multiply 4 x 3, answer comes is 12, write 2 down and carry 1 up.
  • Cross multiply 4 x 2 and 3 x 2 and than add both answer comes is 14 and add 1 (carry). Now answer is 15. Write 5 down and carry 1 up.
  • Similarly cross multiply 1 x 4 and 2 x 2. Adding both we get 8 and add 1 (carry). Now answer is 9. Now writ it down. There is no carry here.
Multiply 2 x 1. Write it down. In case if any carry is there add the carry digit and than write final answer down. Finish.
  

124567 x 96 = 11958432

I have tried to explain this sum graphically. I hope it helps you.

















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