## Thursday, 11 April 2013

### Chapter 4. Multiplication Table For 5 And 7, Key Numbers For Week Days

Now, let's move to the next multiplication table i.e. for 5.

 MULTIPLICATION TABLE FOR 5 MULTIPLICATION SUMMATION RESULT 5 x 0 0 00 5 x 1 5 05 5 x 2 5 + 5 10 5 x 3 5 + 5 + 5 15 5 x 4 5 + 5 + 5 + 5 20 5 x 5 5 + 5 + 5 + 5 + 5 25 5 x 6 5 + 5 + 5 + 5 + 5 + 5 30 5 x 7 5 + 5 + 5 + 5 + 5 + 5 + 5 35 5 x 8 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 40 5 x 9 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 45 5 x 10 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 50

What you see?
Yes, all first digits in RESULT column are following a particular sequence i. e. 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, and so on.. While all the 2nd digits in the same column are repetitive occurrence of 0, 5.

So, let's find 5 x 7 then-
1st digit: 0, 0, 1, 1, 2, 2, 3 and 3.
2nd digit: 0, 5, 0, 5, 0, 5, 0 and 5.
Therefore we get 5 x 7 = 35.

(Note: Here also we have to count from 0)

Time to move to our next, last and the most important multiplication table i.e. for 7.

 MULTIPLICATION TABLE FOR 7 MULTIPLICATION SUMMATION RESULT 7 x 0 0 00 7 x 1 7 07 7 x 2 7 + 7 14 7 x 3 7 + 7 + 7 21 7 x 4 7 + 7 + 7 + 7 28 7 x 5 7 + 7 + 7 + 7 + 7 35 7 x 6 7 + 7 + 7 + 7 + 7 + 7 42 7 x 7 7 + 7 + 7 + 7 + 7 + 7 + 7 49 7 x 8 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 56 7 x 9 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 63 7 x 10 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 70 7 x 11 add 7,11 times 77 7 x 12 add 7,12 times 84 7 x 13 add 7,13 times 91 7 x 14 add 7,14 times 98 7 x 15 add 7,15 times 105 7 x 16 add 7,16 times 112 7 x 17 add 7,17 times 119 7 x 18 add 7,18 times 126 7 x 19 add 7,19 times 133 7 x 20 add 7,20 times 140

Well, sorry this time I don't have any trick to remember this multiplication table. All you will have to do is to learn this one by yourself.

Go to Create Multiplication Table For 5 And 7 Easily At Any Time to know how to create multiplication table for 7 easily on time..

I would like to tell you again- Take your time… Believe in yourself… If I could do, you can also do… So, prepare yourself thoroughly and then move to the next chapter… Remember one thing- fully armed and skilled warrior never loses in the war…!! :)

Till now we were preparing ourselves before diving into the actual trick. The simplest step of the trick is to find the day of week from the final result.

Key Numbers For Week Days:

When we will finish our calculations we will get the final result as one of the numbers: 0, 1, 2, 3, 4, 5 and 6. This number will decide the day of week. See the table below:

 SUN MON TUE WED THU FRI SAT 1 2 3 4 5 6 0

Our week will start with Sunday (i.e. 1) and end with Saturday (i.e. 0 instead of 7). In case you get the result other than these 7 digits (0, 1, 2, 3, 4, 5 and 6) then it's for sure that your calculations went wrong and you have not calculated the remainder correctly when your addition was divided by 7. So, be careful while doing the calculations especially, finding the remainder.

In the next chapter, we will discuss Key Numbers For Months.

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