Maths Tricks

## How to write Table of any two digit number ?

Most of the students are not good at memorizing multiplication  table of number after 15 and ends up not solving the problems just because if they multiply each number then it will take more time then the trick discussed below. So have a look at this trick which is much easier then the regular method of deriving tables.

Example:- Table of 25

First write down table of 2 then write down table of 5 besides table of 2

2 5 25

4 10 (4+1) 50

6 15 (6+1) 75

8 20 (8+2) 100

10 25 (10+2) 125

12 30 (12+3) 150

14 35 (14+3) 175

16 40 (16+4) 200

18 45 (18+4) 225

20 50 (20+5) 250

Example :-  87

First write down table of 8 then write down table of 7 besides table of 8

8 7 87

16 14 (16+1) 174

24 21 (24+2) 261

32 28 (32+2) 348

40 35 (40+3) 435

48 42 (48+4) 522

56 49 (56+4) 609

64 56 (64+5) 696

72 63 (72+6) 783

80 70 (80+7) 870

Lets take one more example :- 93

First write down table of 9 then write down table of 3 besides table of 9

9 3 93

18 6 (18+0) 186

27 9(27+0)279

36 12(36+1)372

45 15(45+1)465

54 18(54+1)558

63 21(63+2)651

72 24(72+2)744

81 27(81+2)837

90 30(90+3)930

Now in exams you don’t have to sit like this and think the multiplication tables of any two digit number.

For more tricks to multiply any number within blink of eyes Click here..!!

For tricks that can blow your mind Click here ..!!

## Multiplication Rules

As we all memorize tables from 2 to 15 very easily but can’t multiply bigger numbers at a great speed like multiplying 2682 * 14 , 7541 * 18 etc so here are some multiplication rules if one can remember then he/she can find product very easily and faster . So remember following rules and practice them as follows :-

Multiply by 5: Multiply by 10 and divide by 2.
Multiply by 6: Sometimes multiplying by 3 and then 2 is easy.
Multiply by 9: Multiply by 10 and subtract the original number.
Multiply by 12: Multiply by 10 and add twice the original number.

Multiply by 13: Multiply by 3 and add 10 times original number.
Multiply by 14: Multiply by 7 and then multiply by 2
Multiply by 15: Multiply by 10 and add 5 times the original number, as above.
Multiply by 16: You can double four times, if you want to. Or you can multiply by 8 and then by 2.

Multiply by 17: Multiply by 7 and add 10 times original number.
Multiply by 19: Multiply by 20 and subtract the original number.
Multiply by 24: Multiply by 8 and then multiply by 3.
Multiply by 27: Multiply by 30 and subtract 3 times the original number (which is obvious from the first step).
Multiply by 45: Multiply by 50 and subtract 5 times the original number (which is obvious from the first step).
Multiply by 90: Multiply by 9 (as above) and put a zero on the right.
Multiply by 99: Multiply by 100 and subtract the original number.

Comment below in case you find any problem in this trick.

Please share this trick of writing table of any two digit number and help them in overcoming fear of mathematics.

Maths Tricks

## Trick 1

Now there is a cool trick to remember formula of volume of Cylinder

you will be amazed to know that the Pizza has a radius of “z” and height “a”, and therefore its volume is Pi x z x z x a which makes up Pizza.

## Trick 2

This little math trick will show you whether a number is divisible by 4 or not. So, this is how it works.

Let’s look at 1234

Does 4 divide evenly into 1234?

### For 4 to divide into any number we have to make sure that the last number is even.

If it is an odd number, there is no way it will go in evenly.

So, for example, 4 will not go evenly into 1233 or 1235 now we know that for 4 to divide evenly into any number the number has to end with an even number.

Back to the question…

4 divides 1234, the solution:

Take the last number and add it to 2 times the second last number. If 4 goes evenly into this number then you know that 4 will go evenly into the whole number.

So 4 + (2 X 3) = 10

4 goes into 10 two times with a remainder of 2 so it does not go in evenly. Therefore 4 into 1234 does not go in completely.

Let’s try 4 into 3436546

So, from our example, take the last number, 6 and add it to two times the penultimate number, 4

6 + (2 X 4) = 14

4 goes into 14 three times with two remainder. So it doesn’t go in evenly.

Let’s try one more. 4 into 212334436

6 + (2 X 3) = 12

4 goes into 12 three times with 0 remainder.

Therefore 4 goes into 234436 evenly.

## Trick 3

Here is one more trick to amaze your friends lets understand it

Step 1: You should have one two-digit numbers.

Step 2: Reverse the number.

Step 3: Subtract the smaller number from the larger one.

Step 4: Take the result, reverse the digits, and add that number to the one you got when you subtracted.

The answer is 99.

Lets try with an example :-

17 reverses to make 71.

Subtract the smaller (17) from the larger (71): 54.

Reverse these digits to make 45.

Add this to the previous number i.e., 45+54.

The answer is 99.

## Trick 4

Step 1: Think of any 3 digit number but all digits should be same like 555

Step 2: Add all digits of number i.e., 5+5+5 = 15

Step 3: Now divide the number by added digits i.e., 555/15

Step 4: Answer is 37 always

Try for 111, 222,333,444 etc

Comment below in case you find any problem in all above tricks.