  ## Wish to have easy Math, Lets practice ## Math&job

Wish to have easy Math, Lets practice ;

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Math&job Successive increase or decrease

formula is
Ultimate Result = A+B+(AB/100)
negative result means ultimate decrease, positive result means ultimate increase.

Example
a Shirt price first increased 8% then decreased 10%, what is ultimate discount or profit for seller?
A= 8 ; B= - 10 (negative sign for decrease)

Ultimate Result = A+B+(AB/100)
=8 + (- 10) + {8(-10)} /100
=8 - 10 + (-80)/100
= - 2 - 0.8
= - 2.8
So it is finally ends up with 2.8% discount
Math&job Lets take a example:
8/5, 6/5, 5/15
L.C.M.=( L.C.M. of 8 ,6, 5) / (H.C.F. of 5, 5, 15)
=120/5

H.C.F.= ( H.C.F. of 8 ,6, 5) / (L.C.M. of 5, 5, 15)
=1/15

I wish your prosperous life, So this is my little greetings for you
Math&job

Hands of a clock Do you know, how many times in a day the hands of a clock are straight ?
Answer: 44 (straight means = coincide+opposite)

How many times are the hands of a clock at right angle in a day?
Answer: 44 ?

How many times are the hands of a clock coincide in a day ?
Answer: 22
Math&job

Clock Math Master piece formula for clock related math.

Angle between hour hand and minute hand = (60*H-11*M)/2 when hour more than 6

Angle between hour hand and minute hand = (11*M-60*H)/2 when hour less than 6
here, H=hour, M=minute
Example: At 10.25 am angle between hour and minute hand is ?
Ans: angle=(10*60-11*25)/2 = 162.5 degree
Reflex angle= (360-162.5)=197.5 degree
Math&job

Divisibility Divisible
by 2: if the last digit is even or zero , then the number is divisible by 2
example : 578 here last digit is 8 which is even so 578 is divisible by 2

by 3 : if sum of all digit of a number is divisible by 3 then the number is also divisible by 3
example: 261, here 2+6+1=9 which is divisible by 3 so 261 is also divisible by 3

by 4: if the last two digit is divisible by 4 , then the number is divisible by 4
example : 35516, here last two digit is 16 which is divisible by 4 so 35516 is also divisible by 4

by 5 : if the last digit is 5 or zero , then the number is divisible by 5
example : 11570 here last digit is 0 so the number is also divisible by 5

by 6 : if the number is divisible by both 2 and 3 then the number is also divisible by 6
example: 738 is divisible by both 2 and 3 so the number is also divisible by 6
Math&job

Divisibility Divisibility
By 8 : if the last three digit is divisible by 8 , then the number is divisible by 8
example : 35516, here last two digit is 516 which is divisible by 8 so 35516 is also divisible by 8

by 9 : if sum of all digit of the number is divisible by 9 then the number is also divisible by 9
example: 261, here 2+6+1=9 which is divisible by 9 so 261 is also divisible by 9
by 11 : if the difference between the sum of its digit in odd place and the sum of its even place is either 0 or a number divisible by 11.
example: 8470, here the sum of the odd placed digit =0+4=4
the sum of the even placed digit =7+8=15
So the difference is= 15-4=11
So, 8470 is also divisible by 11.
Math&job

Place value and face value What is the place value and Face value of 8 in a number 5248456 ?
Answer:
Place value or local value of 8 = 8000
face value of 8 = 8

another example: 1445636
here place value or local value of 3 = 30
face value of 3 = 3
Math&job

Counting divisor Counting divisor
So number of divisor = (power +1) X (power+1 ) .............
lets take another example, 648
648=2 X 2 X 2 X 3 X 3 X 3 X 3
=2^3 X 3^4
so number of divisor of 648 =(3+1) X (4+1) =4 X 5 =20

You have your own theory, idea, experience, style but Hesitated to express if people laugh at. It could be world winning theory or style, who knows! so reveal it for other. Let the people know it.

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