30 math tricks for fast calculations
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- เผยแพร่เมื่อ 6 ก.พ. 2025
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After applying an arithmetic operation to two operands and getting a result, you can use this procedure to improve your confidence that the result is correct.
Sum the digits of the first operand; any 9s (or sets of digits that add to 9) can be counted as 0.
If the resulting sum has two or more digits, sum those digits as in step one; repeat this step until the resulting sum has only one digit.
Repeat steps one and two with the second operand. You now have two one-digit numbers, one condensed from the first operand and the other condensed from the second operand. (These one-digit numbers are also the remainders you would end up with if you divided the original operands by 9; mathematically speaking, they're the original operands modulo 9.)
Apply the originally specified operation to the two condensed operands, and then apply the summing-of-digits procedure to the result of the operation.
Sum the digits of the result you originally obtained for the original calculation..
If the result of step 4 does not equal the result of step 5, then the original answer is wrong. If the two results match, then the original answer may be right, though it isn't guaranteed to be. www.gargunivers... Check out Ebook "Mind Math" from Dr. Garg
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X is the rate of the profit as a floating point number for your investment.
For example X can be 0.1 or 0.76.
Proper way to calculate how much times it will take to multiply your money by a:
f(t) = (1+x)^t = a where t is time
(1+x)^t = a || log
log( (1+x)^t ) = log(a)
t log (1+x) = log(a) || :log(1+x)
t = log(a)/(log(1+x) (log means that it will work with any logarithm)
Are you kidding me the best video ever! Omg thanks so much and I have SATS Tomorrow! THANK YOU SIR.
8 hours/day
40 hours/week
50 weeks/year (considering 2 weeks of holidays)
50 x 40 = 2000 hours
Thank you man. I really needed these tutorials and I took notes. There aren't actually 30 different fast calculations though. I only got about 15 some videos are repeated but thanks again.
Thanks. I have made a note on the video.
I'm soo engaged with these 2s I'm like saying out loud "TOO!" One hundred "TOO!" Just awesome!!! :)
THAT-IS-AMAZING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Good Video. For multiplying by 11, it would be better to start the addition from the right side (i.e. the units side). Similarly, for 12 the calculations can be better done from the right side.
dude i so almost understood this up until i realized what im looking at..math ugh🙄 ill subscribe thanx.
I didn't get any of this but please tell me some tips of "How to get prepared for a maths test" Thank you
Thank you; come again!
Dear Sir,, ur voice is really nice...
Nice video. what did you use (software or accessory) to write and show us ?? Please let me know because I want to have one.
great tips...thanks
i am so excited thank you for this video.
I like this videos for my bank exam prepretion
Nicely explained ... Thanks
+shaik yaseen Thanks to you
if u study u will think math is easy so dont think math is hard all u have to do is study study and study until u get the right answer and pay attention
Rule of 72 and 115 to double your investment is wrong because you have not specified on simple interest or compound interest.
Nice trick! thanks
very gud ......awesum.....tricks
THAT IS REALLY AMAZING!!!
Really good awesome great magnificent superb video!
i didn't get how u r caluculating the rule 72, 1.1^7.2 = 1.9862 it is still not approximating 2, is there any mistake in my view?? please clarify it
1.9862 is approximately 2. Rule of 72 is to get approximate numbers of years for money to double at a given interest rate. Please looks for "Rule of 72" on my channel with detailed explanation.
thank u...
Hello sir,
I like your video. I want to know about tools you used to setup this home recording studio. means which camera, mic you used and which digital tablet you use.
did you hire someone to record this videos.
thanks
First trick to see the screen - Annotations off.
You a realy funny!!😭👍👍
nice trick I love it😌😏😉☺😊😄
that's great
nice trick thank you
very good excellent
amazing! From cambodia
yes
@ptjwnn
Calculation for hourly work rates
52 (weeks) x 5 (Weekdays) x 8 (Hours) = 2080 ~ 2000 approx.
52 (weeks) x 6 (Weekdays) x 8 (Hours) = 2496 ~ 2500 approx.
Vaibhav Sharma Nobody caaaares
Ampy lol
Vaibhav Sharma xD
Awesome!!
Good .A bit trying for tired souls !
all u need to do is understand d concept......remaining else will come to u in a perfect manner widout any mistake!!!!!!!!NOTE: ONLY UNDERSTAND CAREFULLY.................
sir would you please tell me how did u made this video? using which tool?
How did you get the 2000 hours? A year has about 2000 hours? You should have explained how many hours the employee is supposed to work daily.
this techniques are used to very easily learn to the calculations
You sound like M.S.Dhoni!!
+thanthoni bro Really! Thanks brother.
+Garg University no problem man,the way you say it sounds like him
Thanks
thanks sir god bless u g.
I am trying to do that cube root trick but somehow I cant. I did what you said but sadly I cant seem to get it right. Like cube root of 431822 according to you would be, 431 that is 7 and 822 ( ends with 2 ) so it will be 8. So it should be 78. But its not.. Am i missing something?
This trick will only work for perfect cubes. You can calculate cube root of 438976
and 421875 using this trick. 431832 is in between these two number and its cube root is not an integer.
Garg University
Oh sorry i probably missed that part.
Awesome
good and cool
good work yar
Math is difficult but I will get it
I guess ur right it is difficult but once u get the hang of it it's right
Flora Fox yeah
whay is special theory of relativity?why r u takingE=mc square
Even at an average of 2 minuter per trick, your video is an hour long. How long did it take to upload that?!
sorry sir,115/20 u maid wrong calculation,i know u did that fast,but correct it,Thank you sir, Nice vedio.
It's nice
NICE
your video is about shares and dividend
i just don't get how u get the devisers.
concepts are cnfusing where can we apply this
nice
Yes bro really sound like Ms dohni!
good
I want simple maths tricks
tq
see thats the problem in indian education system for eg in sat calculator is allowed but in jee or other exams its not. the calculator is invented for that use only so freaking use it
Sinply great
Simply Great
***** stupid where r u from
give some tutorial
115/20 = 5.75 not 6.725
39:05
20% = 115/20 = 5.75
time to triple your money with 20 percent interest you need only 5.725 years
there are some mistakes in 20 percent
Thank you verymuch,degree "mpcs" complete aina tarvatha,nenu yemcheiya vachcho anni cheppandi(job gurinchi)
BANKING,RRB gurinchi importent
I thought I saw Einstein.
20% of 72 is 14.4
👌
115/20=5.75 but you r telling 115/20=6.725?????
（＊＾－＾）ノ 分数の所が興味深いです☆
Top comments
shaik yaseen8 months ago
Nicely explained ... Thanks
Reply 1 Garg University8 months ago
+shaik yaseen Thanks to you
Reply Simha Reddy1 month ago
your video is about shares and dividend
Reply
shaik najumuddin2 months ago
Thank you verymuch,degree "mpcs" complete aina tarvatha,nenu yemcheiya vachcho anni cheppandi(job gurinchi)
BANKING,RRB gurinchi importent
Reply
Simha Reddy1 month ago
I want simple maths tricks
Reply
ganesh mareedu1 month ago
nice
Reply
thanthoni bro7 months ago
You sound like M.S.Dhoni!!
Reply Garg University6 months ago
+thanthoni bro Really! Thanks brother.
Reply thanthoni bro6 months ago
+Garg University no problem man,the way you say it sounds like him
Reply BeerGogglesReviews2 years ago
First trick to see the screen - Annotations off.
Reply 9 roseta likutabua9 months ago
You a realy funny!!😭👍👍
Reply Mariam Osama7 months ago
THAT-IS-AMAZING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Reply 1
Sciencing Around2 months ago
hey bros.....
how is my video.....plz watch them and be my critic
Reply
Navin Pravin6 months ago
THAT IS REALLY AMAZING!!!
Reply
Alvarez Nureach1 year ago
amazing! From cambodia
Reply 1 Thoeun sreynoch1 year ago
yes
Reply seinundzeiten9 months ago
great tips...thanks
Reply
Rajeev Kumar Negi10 months ago
thanks sir god bless u g.
Reply
Harlan L Olson6 months ago
Schlong Academy
Reply
LegitLogic6 months ago
Even at an average of 2 minuter per trick, your video is an hour long. How long did it take to upload that?!
Reply
Ashok Gaddam11 months ago
time to triple your money with 20 percent interest you need only 5.725 years
Reply
う山雄一10 months ago
（＊＾－＾）ノ 分数の所が興味深いです☆
Reply
Sachiel Edward1 year ago
all u need to do is understand d concept......remaining else will come to u in a perfect manner widout any mistake!!!!!!!!NOTE: ONLY UNDERSTAND CAREFULLY.................
Reply 1
Ashish Rawat1 year ago (edited)
see thats the problem in indian education system for eg in sat calculator is allowed but in jee or other exams its not. the calculator is invented for that use only so freaking use it
Reply
srihari chenagalla1 year ago
It's nice
Reply 1
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plz see my the shortcut method in math plz by the way i,m ten
i really dont want to go to shool but my sis has a new channel check it out
ms dhoni much better than u
+Diaa Bansal Yes. It is true. I can not bat or keep wickets.
nice
good
115/20 = 5.75 not 6.725
my school chinna
telent nepali gays
good