math

1. The 11 Times Trick

We all know the trick when multiplying by ten – add 0 to the end of the number, but did you know there is an equally easy trick for multiplying a two digit number by 11? This is it:

Take the original number and imagine a space between the two digits (in this example we will use 52:

5_2

Now add the two numbers together and put them in the middle:

5_(5+2)_2

That is it – you have the answer: 572.

If the numbers in the middle add up to a 2 digit number, just insert the second number and add 1 to the first:

9_(9+9)_9

(9+1)_8_9

10_8_9

1089 – It works every time.
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2. Quick Square

If you need to square a 2 digit number ending in 5, you can do so very easily with this trick. Mulitply the first digit by itself + 1, and put 25 on the end. That is all!

252 = (2x(2+1)) & 25

2 x 3 = 6

625
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3. Multiply by 5

Most people memorize the 5 times tables very easily, but when you get in to larger numbers it gets more complex – or does it? This trick is super easy.

Take any number, then divide it by 2 (in other words, halve the number). If the result is whole, add a 0 at the end. If it is not, ignore the remainder and add a 5 at the end. It works everytime:

2682 x 5 = (2682 / 2) & 5 or 0

2682 / 2 = 1341 (whole number so add 0)

13410

Let’s try another:

5887 x 5

2943.5 (fractional number (ignore remainder, add 5)

29435
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4. Multiply by 9

This one is simple – to multiple any number between 1 and 9 by 9 hold both hands in front of your face – drop the finger that corresponds to the number you are multiplying (for example 9×3 – drop your third finger) – count the fingers before the dropped finger (in the case of 9×3 it is 2) then count the numbers after (in this case 7) – the answer is 27.
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5. Multiply by 4

This is a very simple trick which may appear obvious to some, but to others it is not. The trick is to simply multiply by two, then multiply by two again:

58 x 4 = (58 x 2) + (58 x 2) = (116) + (116) = 232



Just paying the bills...








6. Calculate a Tip

If you need to leave a 15% tip, here is the easy way to do it. Work out 10% (divide the number by 10) – then add that number to half its value and you have your answer:

15% of $25 = (10% of 25) + ((10% of 25) / 2)

$2.50 + $1.25 = $3.75
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7. Tough Multiplication

If you have a large number to multiply and one of the numbers is even, you can easily subdivide to get to the answer:

32 x 125, is the same as:
16 x 250 is the same as:
8 x 500 is the same as:
4 x 1000 = 4,000
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8. Dividing by 5

Dividing a large number by five is actually very simple. All you do is multiply by 2 and move the decimal point:

195 / 5

Step1: 195 * 2 = 390
Step2: Move the decimal: 39.0 or just 39

2978 / 5

step 1: 2978 * 2 = 5956
Step2: 595.6
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9. Subtracting from 1,000

To subtract a large number from 1,000 you can use this basic rule: subtract all but the last number from 9, then subtract the last number from 10:

1000
-648

step1: subtract 6 from 9 = 3
step2: subtract 4 from 9 = 5
step3: subtract 8 from 10 = 2

answer: 352
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10. Assorted Multiplication Rules

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 18: Multiply by 20 and subtract twice the original number (which is obvious from the first step).
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 98: Multiply by 100 and subtract twice the original number.
Multiply by 99: Multiply by 100 and subtract the original number.

Bonus: Percentages

Yanni in comment 23 gave an excellent tip for working out percentages, so I have taken the liberty of duplicating it here:

Find 7 % of 300. Sound Difficult?

Percents: First of all you need to understand the word “Percent.” The first part is PER , as in 10 tricks per listverse page. PER = FOR EACH. The second part of the word is CENT, as in 100. Like Century = 100 years. 100 CENTS in 1 dollar… etc. Ok… so PERCENT = For Each 100.

So, it follows that 7 PERCENT of 100, is 7. (7 for each hundred, of only 1 hundred).
8 % of 100 = 8. 35.73% of 100 = 35.73
But how is that useful??

Back to the 7% of 300 question. 7% of the first hundred is 7. 7% of 2nd hundred is also 7, and yep, 7% of the 3rd hundred is also 7. So 7+7+7 = 21.

If 8 % of 100 is 8, it follows that 8% of 50 is half of 8 , or 4.

Break down every number that’s asked into questions of 100, if the number is less then 100, then move the decimal point accordingly.

EXAMPLES:
8%200 = ? 8 + 8 = 16.
8%250 = ? 8 + 8 + 4 = 20.
8%25 = 2.0 (Moving the decimal back).
15%300 = 15+15+15 =45.
15%350 = 15+15+15+7.5 = 52.5

Also it’s usefull to know that you can always flip percents, like 3% of 100 is the same as 100% of 3.

35% of 8 is the same as 8% of 35

Mathematic trics

Multiply Up to 20X20 In Your Head In just FIVE minutes you should learn to quickly multiply up to 20x20 in your head. With this trick, you will be able to multiply any two numbers from 11 to 19 in your head quickly, without the use of a calculator.
I will assume that you know your multiplication table reasonably well up to 10x10.

Try this:


Take 15 x 13 for an example.
Always place the larger number of the two on top in your mind.
Then draw the shape of Africa mentally so it covers the 15 and the 3 from the 13 below. Those covered numbers are all you need.
First add 15 + 3 = 18
Add a zero behind it (multiply by 10) to get 180.
Multiply the covered lower 3 x the single digit above it the "5" (3x5= 15)
Add 180 + 15 = 195.

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The 11 Rule
You likely all know the 10 rule (to multiply by 10, just add a 0 behind the number) but do you know the 11 rule? It is as easy! You should be able to do this one in you head for any two digit number. Practice it on paper first!
To multiply any two digit number by 11:

For this example we will use 54.
Separate the two digits in you mind (5__4).
Notice the hole between them!
Add the 5 and the 4 together (5+4=9)
Put the resulting 9 in the hole 594. That's it! 11 x 54=594
The only thing tricky to remember is that if the result of the addition is greater than 9, you only put the "ones" digit in the hole and carry the "tens" digit from the addition. For example 11 x 57 ... 5__7 ... 5+7=12 ... put the 2 in the hole and add the 1 from the 12 to the 5 in to get 6 for a result of 627 ... 11 x 57 = 627
Practice it on paper first!

आई

आई हा एक शब्द आहे असं म्हणण व्यर्थ आहे कारण त्यात आहे जे वात्सल्य शब्दात उतरवणं आहे ते अशक्य!!
तरी हा एक प्रयास आहे तिच्याच वाढदिवसाला छोटीशी एक भेट आहे ..
आई म्हणजे मंदिराचा उंच कळस
आई म्हणजे अंगणातील पवित्र तुळस
आई म्हणजे भजनात गुणगुणावी अशी संतवाणी
आई म्हणजे आरतीत वाजवावीअशी लयबध्द टाळी
आई म्हणजे वेदनेनंतरची सर्वात पहिली आरोळी.......

मी एक चातक आहे तर ती पर्जन्यचा थेंब आहे
मी अत्तर तर ती त्यातला सुगंध आहे
माझ्या आयुष्याची ती एक चित्रकार आहे
अंधारात मला दिसणारा आशेचा किरण आहे
कोणत्याही वादळात तग धरून राहीलेली माझ्या आयुष्यातील कल्पतरु आहे
जिच्यामुळे मी, माझी कविता आहे
ती माझी......माझीच फक्त आई आ

Fakt tuzyasathi !!

Love letter,love letter mhanje,love letter aste.

Thet jaun bolnya pexa EASY aani BETTER aste.

God gulabi thanditla,gulabi SWETTER aste.

Ghusal Ghusal ghusalalelya,manatle,BUTTER aste.

love letter,love letter mhanje ek SONG aste.

jyatla CONTENT RIGHT aani GRAMMER WRONG aste.

suchat nahi tewha tumchya HEART
madhala PAIN aste.

aani jewha suchta tewha nemka khishat PEN naste.

Patla tar KISS aani,khatakla tar SANDAL(khetar) aste.

love letter,love letter mhanje REAR HABBIT aste, war war LION aatun bhedarlela RABBIT aste.

SHAKY-SHAKY hata madhun,thartharnare WORD aste.

Nuktech pankh futlele CUTE-CUTE BIRD aste, ani HOPEFUL dolyatla DROP-DROP WATER aste.

Love letter,love letter mhanje,ek AGREEMENT aste.

50% CERTAIN aani 50% JUDGMENT aste OPPONENT chya STRATEGY war pudhcha sagla DEPEND aste.

sagla asto thet sauda, kahi sudha LEND naste.

HEART deun HEART ghyayche,saral sadhe BARTER aste.

Love letter,love letter mhanje,ek DREAM aste,LIFE chya PASTRY varacha SWEET-SWEET CREAM aste.

HALF-HALF pyawe ase shahalyatle WATER aste, tisryasathi nahi ase agdi PRIVATE MATTER aste.

doghansathi bandhalela 70mm THEATRE aste.

-maitra

Fakt tuzyasathi !!

Love letter,love letter mhanje,love letter aste.

Thet jaun bolnya pexa EASY aani BETTER aste.

God gulabi thanditla,gulabi SWETTER aste.

Ghusal Ghusal ghusalalelya,manatle,BUTTER aste.

love letter,love letter mhanje ek SONG aste.

jyatla CONTENT RIGHT aani GRAMMER WRONG aste.

suchat nahi tewha tumchya HEART
madhala PAIN aste.

aani jewha suchta tewha nemka khishat PEN naste.

Patla tar KISS aani,khatakla tar SANDAL(khetar) aste.

love letter,love letter mhanje REAR HABBIT aste, war war LION aatun bhedarlela RABBIT aste.

SHAKY-SHAKY hata madhun,thartharnare WORD aste.

Nuktech pankh futlele CUTE-CUTE BIRD aste, ani HOPEFUL dolyatla DROP-DROP WATER aste.

Love letter,love letter mhanje,ek AGREEMENT aste.

50% CERTAIN aani 50% JUDGMENT aste OPPONENT chya STRATEGY war pudhcha sagla DEPEND aste.

sagla asto thet sauda, kahi sudha LEND naste.

HEART deun HEART ghyayche,saral sadhe BARTER aste.

Love letter,love letter mhanje,ek DREAM aste,LIFE chya PASTRY varacha SWEET-SWEET CREAM aste.

HALF-HALF pyawe ase shahalyatle WATER aste, tisryasathi nahi ase agdi PRIVATE MATTER aste.

doghansathi bandhalela 70mm THEATRE aste.

-maitra

U & Me !

Dear G.
jaisa k tum janti ho,k mai pahle khud k liye blog likha karta tha. Lekin ab aisa nahi hai,ek likne ka jariya ban gai ho tum. Aur aage bhi likhunga k muze yaha read karne wala koi maujud to hai. Direct na sahi indirect hi kyu na ho,koi to hai to dil se muze padhega. Mere SMS ka jis taraha se tum wait karti ho,blog ka bhi jarur karogi.

any way ab mai dusre topic pe aata hu. Kal mai apne bua ki ladki ki beti jo doctr hai. Lagbhag meri hi umar ki. Usse emotional aur practical hone k bare me thodi discussion ki. Wo bahot practical hai,kaise?
-uske father unki pahli bivi k 7 rahte hai. Inki family ko shikayat hai k unhone apni dusri shadi k bare me na batake inhe dhoka diya hai. Lekin muze ajib lagta hai,yaha 1 ladki dr. Aur baki 2 ladkiya engineer hai. Lekin inke alag rahte hue bhi. Is dr.k pita hi inke pariwar ki puri jimmedari uthate rahe hai. Dhyan dene layak bat hai k unke pahli bivi se unhe 2 ladkiya hai,wo bhi engineer hai. Unhone apni jimmedari apni santan k bare me puri ki. Wo peshe se TALATHI hai. Unho ne meri bua ki ladki ko apne sasural rahne ko bola hai,yaha pe shikayat bua ki ladki karti hai apne saas se. Lekin is puri kashmakash me meri bhanji(dr.aur uski 2 bahne) inko pita ka sahara, unke 7 rahne ka mauka mil hi nahi pata.

kitne problem hai nahi jindagi me? hamara priya wyakti hamare 7 hote hue bhi 7 nahi hai. Kitna taklif dene wala prasang hai ye? hai na?? kyu hota hai aisa. Rai jitne sukh aur pahad jaise dukh? har insan chahe jitna amir/garib ho. Dukh uska picha nahi chodta.

hume jariye paida karna hoga,dhundna hoga jaha se sukh mile. Us BYCHANCE shabd ko humari jindgi se darkinar karna hoga. Taki agar dukh aaye to hume sirf chukar nikal jaye. Jakhm na de.

Tum aur mai dono ko jindagi ne bahot dukh diye hai. Aur humne khud ek dusre ko in mushkil maukon pe 1 jariye k rup me paya. Har mauke ko golden moment me tabdil kiya. Isliye hume us uparwale ka shukragujar hona chahiye. Jindagi k is kadi dhup me tumhare sath ki ye thandak sahi mayne me jindagi ko khubsurati de rahi hai. Thanx a lot. Tc.

"TUMSE JUDA HOKAR MUZE DUR JANA HAI,PAL BHAR KI JUDAI FIR LAUT ANA HAI."

filmo me judai k drushya hum popcorn khate hue maze me dekhte hai. Bhul hi jate hai k filme samaj k darpan hai. Hum b uske patra ho sakte hai. Kitna mushkil hai apne priyajano se bichadna? pata nahi ishwar ne sare praniyon me itni bhaukta kyu koot koot me kyu bhar deta hai. Wo bichadne ka dard to shabdon me bayan karna to bass asambhav hai.

muze jalan hoti hai us Anaconda saap se jo apne bachhe paida karke unhe hamesha k liye bhul jata hai. Aur bachhe b apni jindagi ka rasta b paida hote hi akele katna chalu kar deta hai. Muze kehna sirf itna hai,ki kamse kam anaconda aur uske bachhe kabhi dukhi nahi hote honge us janlewa JUDAI se.

any way aaj mera apne aprentice k ladke k 7 jamke zagda hua, batein hui nahi sirf mardhad. Khud ko kismat wala manta hu k maine uske 7 janwar jaisa saluk nahi kiya. Abbhi mai sihar jata hu k maine sirf uske chehre ko target karke punch marna chalu kiya. Aise me agar use gambhir chotein lagti to. . . !

kal ki shadi bahot achhi rahi,lekin Rupa,yani dulhan ko dekhke laga jaise kisine use jabardasti stage pe khada kiya hai. Kamse kam uske chehre ki kritrim(artificial) hansi yahi darshati rahi. Firse humara college ka group sath mila. Shyamli k tewar kuch jyada hi badle najar aaye. Karti b kya bechar-patidev sath me the na. Lekin ant bhala to sab bhala, patidev k jane k baad wo acchi tarah se khul gai. Uski beti nihayat khubsurat hai,lekin shyamli se jyada nahi.

Guddi tum ko shikayat hai,k mai tumhare bare me kuch nahi likhta,lekin aisa likhne se behatar muze tumse batein karna bahot accha lagta hai,lagta hai jaise mere sharir k kisi hisse se batein kar raha hu. Mai samaj nahi pa raha hu k akele pan me,jab tum mere 7 nahi rahogi tab mai kaise ji paunga tumhare siwa. Bolo na kaise? ? ? kya tum bhul paogi muze ? ? ? ?

"TUMSE JUDA HOKAR MUZE DUR JANA HAI,PAL BHAR KI JUDAI FIR LAUT ANA HAI."

filmo me judai k drushya hum popcorn khate hue maze me dekhte hai. Bhul hi jate hai k filme samaj k darpan hai. Hum b uske patra ho sakte hai. Kitna mushkil hai apne priyajano se bichadna? pata nahi ishwar ne sare praniyon me itni bhaukta kyu koot koot me kyu bhar deta hai. Wo bichadne ka dard to shabdon me bayan karna to bass asambhav hai.

muze jalan hoti hai us Anaconda saap se jo apne bachhe paida karke unhe hamesha k liye bhul jata hai. Aur bachhe b apni jindagi ka rasta b paida hote hi akele katna chalu kar deta hai. Muze kehna sirf itna hai,ki kamse kam anaconda aur uske bachhe kabhi dukhi nahi hote honge us janlewa JUDAI se.

any way aaj mera apne aprentice k ladke k 7 jamke zagda hua, batein hui nahi sirf mardhad. Khud ko kismat wala manta hu k maine uske 7 janwar jaisa saluk nahi kiya. Abbhi mai sihar jata hu k maine sirf uske chehre ko target karke punch marna chalu kiya. Aise me agar use gambhir chotein lagti to. . . !

kal ki shadi bahot achhi rahi,lekin Rupa,yani dulhan ko dekhke laga jaise kisine use jabardasti stage pe khada kiya hai. Kamse kam uske chehre ki kritrim(artificial) hansi yahi darshati rahi. Firse humara college ka group sath mila. Shyamli k tewar kuch jyada hi badle najar aaye. Karti b kya bechar-patidev sath me the na. Lekin ant bhala to sab bhala, patidev k jane k baad wo acchi tarah se khul gai. Uski beti nihayat khubsurat hai,lekin shyamli se jyada nahi.

Guddi tum ko shikayat hai,k mai tumhare bare me kuch nahi likhta,lekin aisa likhne se behatar muze tumse batein karna bahot accha lagta hai,lagta hai jaise mere sharir k kisi hisse se batein kar raha hu. Mai samaj nahi pa raha hu k akele pan me,jab tum mere 7 nahi rahogi tab mai kaise ji paunga tumhare siwa. Bolo na kaise? ? ? kya tum bhul paogi muze ? ? ? ?

"Zindagi kaisi hai paheli khali, kabhi ye hasaye,kabhi ye rulaye."
Kisi hindi film ka ye gana hamari zindagi pe kitna satik baithta hai,nahi? lagta hai jaise ye gana sirf humare liye bana hai,ya yu kahein sirf mere liye bana hai. Shayad yahi wajah hai ki filmon ko hamare jiwan ka aaina kaha jata hai.
Nischit hi mai yaha filmon ki batein nahi kar raha. Balki humare rishto naton k us najuk bandhan ko samajne ki koshish kar raha hu jo dhage se bhi najuk aur kamjor hote hai. Samaj banta hai logon se,humse. Aur pariwar b humse hi bante hai. Jo ki ghar ki neev hoti hai. Mai nahi manta k ghar eet,mitti,reti ya cement se bante hai. Unse banta hai sirf makan. Makan ko ghar me tabdil isaan banate hai. Lekin insan, pariwar banata hai? bilkul nahi! pariwar banta hai vishwas se. Vishwas 1 pani ka bulbula hi to hai,jiski umr ka koi bharosa nahi. Tabhi to samaj me bacche sirf shadi hote hi apne maa,baap ko apne pariwar ki 1 aisi kachhi kadi samajte hai jiska ghar pariwar k sankal me koi mahatwa hi nahi hai.
muze ajib hi lagta hai k kaise hum apne janm se lekar apni jawani tak ka safar jin maa bap se judkar karte hai, sirf us parayi aurat jo hal hi me humare pariwar ki sadasya banti hai. Uske vichar,uske mat aur uski chand baton ke karan maa baap paraye lagne lagte hai. Ye kaisa andha vishwash? kaise kamjor natein,rishtein ?? kya yahi hai humara pyar aur usko jodne wali rihton ki gond?

Time pass

Once my female friend visited my blog. At that time she laughed for my this activity. Bt really she dont know- near future this blog will touch the limit of hight. Where u cant find urself due to unlimited followers. Isnt it. Tc. Bye
:-)