Sunday 27 October 2013

Mind Reading (problem 13)

Mind reading

There is a connection or pattern in doing the mind reading, for example....

                                      5  and ?  = 45

You need to guess what is the number for ?. Let's look at the working.

                                      a)   59 - 14 (5+9) = 45
                
                                      b)   54 - 9 (5+4) = 45

This shows that as long as there is the equation sum falls under 9, there is no mistake to say that your answer will be right.  Remarkable isn't it?

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