Simple Mathematical Trick — logical thinking

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maths-problemsSimple Mathematical Trick to write multiplication table of 9.
I have a friend who is intelligent, but he doesn’t like maths, and he is not able to learn many basic things in mathematics, So I shared many of my schooldays tricks with him and he was very happy. In all those tricks I found this one as the most simple and interesting trick. This might be an old trick for many of you, if you already know such tricks then please share it with us in the comment section. Many people who are scared about mathematics will get a lot of help from your knowledge, so please share it in the comment section.

Go through this article, if you are a computer programmer. You can use this logic to implement in your programs. And by going through this type of tricks your logical thinking ability will be enhanced and you can write better programs with minimum coding. I have already written C, C++ and Java programs implementing such simple mathematical tricks and they have very little coding and many people get stuck in understanding the logic behind those programs, but to their wonder the program will be working fine.

Here is the trick…

9 x 1  =  9

9 x 2  = 18

9 x 3  = 27

9 x 4  = 36

9 x 5  = 45

9 x 6  = 54

9 x 7  = 63

9 x 8  = 72

9 x 9  = 81

9 x 10 = 90

Now observe the results of multiplication… there are 2 digits in the resulting numbers, i.e.,

I         II

———

09 = 0|9

18 = 1|8

27 = 2|7

36 = 3|6

45 = 4|5

54 = 5|4

63 = 6|3

72 = 7|2

81 = 8|1

90 = 9|0

like this it continues till infinity.

Observe the like colors above. The numbers in “blue” color are ascending numbers(arranged from the smallest to the largest number) and the numbers in “gray” are descending numbers(arranged from the largest to the smallest number) and the combination would be the multiplication table for 9, till infinity.

Above mentioned method is easier than:-

9 + 0   =   9

9 + 9   =   18

9 + 18 =    27

9 + 27 =   36

9 + 36 =   45

9 + 45 =   54

9 + 54 =   63

9 + 63 =   72

9 + 72 =   81

9 + 81 =   90

9 + 90 =   99

till infinity.

There are many such mathematical tricks to learn the basics, but I thought multiplication table of 9 is more interesting, so just shared it with you..Please share your knowledge in the comment section and you could be helping a lot of people to get through their school or/and college exams.

4 thoughts on “Simple Mathematical Trick — logical thinking”

  1. Great trick. I am doing a logical thinking presentation in two weeks in my college class and will use this as an example of Logical thinking.

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