Speciality of 0...

Speciality of '0'

0 is a very unique number and it's speciality can started in following points :

       1)    '0' is a whole number as well as Integer.

       2)    '0' can never possess + or - sign because it is been invented for our convenience.

        

               for e.g., :-  0 - 7 = -7, 0 + 7 = 7, -7 + 7 = 0

                  

                               0 x 7 = 0 , 7 x 0 = 0, -7 - 0 = -7

                            

                              7 - 0 = 7, 7 + 0 = 7, 7 - 7  =  0 

          

                              0/7  =  0 but  7/0  ≠ 0 because


it will give answer as '∞' i.e., infinity and which is not an appropriate answer. Hence it is clear from the above 


examples that '0' has been invented just for our convenience while solving mathematical operation and nothing


else.


         3) Every number loses it's value or it becomes zero whenever it is multiplied with '0' or it is dividing


zero..


          4) It is the only number which is the largest number from negative infinity and the smallest from the


positive infinity. It always remains in the center of real number line....    

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Adding Time

Here is a nice simple way to add hours and minutes together:

Let's add 1 hr and 35 mins and 3 hr 55 mins together.


What you do is this:
make the 1 hr 35 mins into one number, which will give us 135 and do the same for the other number giving us 355

Now you want to add these two numbers together:

 

135
355
____
490

 

So we now have a sub total of 490. What you need to do to this and all sub totals is add the time constant of 40.

No matter what the hours and mins are, just add the 40 time constant to the sub total.
490 + 40 = 530

So we can now see our answer is 5 hrs and 30 mins! 


NOTE: Works only when the tens places are 6 to 9

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