Multiplication of Any Two digit Number in 3 Seconds | Fast Math Tricks | Competitive Exams

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Multiplication of Any Two digit Number in 3 Seconds | Fast Math Tricks | Competitive Exams

Can you solve this in 3 seconds?
62×74= ?
89×94= ?
The answer is yes if you knows this trick.
Step 1: Product of unit digits of both numbers
Step 2: Cross multiplication of both numbers and add them
Step 3: Product of last digits of both numbers

#Fastway #Multiplication #Mathtricks
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Great vide. Just wondering what the patter is for 3 digit x 3 digit numbers is. Also 3 digit x 2 digit numbers

benhutchen
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I have a related problem. I have spent 6 months trying to find a shortcut as it is a cornerstone of some maths I need for an MP3 player on the ARM Cortex M0+ processor.

I need to multiply two 2-digit numbers together but I only need the thousands and hundreds. Now, my first insight is that the units column cannot overflow because in effect 0 is being added to it. Then I don't need the tens value, just the carry value.

FYI the M0+ CPU has a MULS instruction that multiplies together two 32 bit numbers but only returns the bottom 32 bits so I have to split the 32 bit values into 16 bit values so an overflow cannot happen.

I have looked at various multiply methods but this is something with no algorithm I can find.

badpharma
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thankyou sir for the math trick, its really working and it helped a lot in my exams

girisircomputercentre-gfee
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It's easier to anything 2 Digit solving and thank you

immalanicequimbo
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Sorry bro u r wrong, it take more than 3 seconds, infact more than 3 min and in your case more than 10 min

jonyjoker
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Oh.. Thanks for a little tip for math tricks...
45 x 52 = 2340

mrbean
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I can do this in 2 sec without using any trick

raghubathini
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NO ONE CAN UNDETSTAND. ARE YOU EXPLAINING TO YOURSELF ONLY

MM-djcv