NUMBER RECREATION

 1 )  NUMBER OF BROTHERS 'N SISTER ONE HAD-IF BOTH THE PARENTS WERE ALIVE

Here   is  a simple trick by which you can tell the number of  brothers and sisters one had.

Step 1-Add the number of parents (obviously it will be two in each case)

Step 2-Add to step 1the number of brothers and multiply the ruselt by 2 and add 1 to it.

Step 3-Now result of step 2 is multiplied by 5 and the number of sisters is added to it.

Step 4-Subtract 25 from step 3 to get  the result.

Step 5-In the result of step 4 the unit 's place indicates the number  of sisters and  the ten's place the

Numbers of  brothers.

HENCE WE CAN WRITE THE FORMULA AS:[(PARENTS+BROTHERS)X2+1]X5+SISTERS-25

EXample:-

Suppose Raz  has 3 brothers & 2 sisters,then the solution would be:

Step 1--- Number of parents   = 2

Step 2---(2+3)x2+1               =   11

Step 3---11x5+2                   = 57

Step 4---57-25                     =32

Step5--- Unit's place          =2 sisters

       ---Ten's place              = 3 brothers

2 )THE AGE OF ANYBODY

If someone is acquainted with the basics of arithmetic,he can tell the age of anybody by following

Simple method given below:-

Step 1- Tell him/her to add his/her present age and the next year's age.

Step 2- Tell him/her to multiply the sum by 5.

Step 3-Tell him/her to add the unit digit of the year in which he/she was born.

Step 4- Tell him/her to subtract 5 from the final result.

Step 5-The left two digits will indicate his/her age.

EXAMPLE:-

Suppose  today  your  friend is 22 years old and  s/he was born in 2047.

Step 1- Present age +next year's age =45

Step 2- Step 1x 5 i.e. 225

Step 3- Step 2 +unit digit of the year in which your friend was born i.e.225+7=232

Step 4- Step 3 -5=232-5=227

Step 5 – The left two digits are 22, hence his age.

3 THE NUMBER OF CURRENCY NOTES IN ONE'S POCKET

1-Ask him/her to write down the number in his/her pocket.

2 –Then double it.

3-Add 1 to the above number.

4-Multiply the above number by 5.

5- Now  add 5 to the above result.

6-Next ask him/her to multiply the result by 10.

7-Subtract 100 from the above number.

8-Now ask to tell you the number.Delete the last two digits from this number and you will get the number of currency notes eventually.

EXAMPLE:-

Suppose your friend writes down the number of currency notes as:   16

On doubling it becomes:                                                    32

Then he adds 1 to the above number:                               33

He multiplies the above number by 5:                               165

He adds 5 to the above result:                                             170

Next he multiplies the number by 10:                                 1700

He then subtracts 100 from the above number to get:       1600

Now ask him to tell you the number after deleting the last two digits from the  result (i.e.1600),you can tell that he has 16 currency notes in his pocket.