Square One TV: Dirk Niblick - Number Trick

[stevarino1989]

Took me awhile to figure that out but how cool! I don't get how the math universe works but that boggles my mind.

[bigboss686]

@stevarino1989 Hows it work?



[stevarino1989]

This show must have been extremely low budget because they keep using the same drawing of Dirk in like, every three shots. They just change the way his mouth moves.

[BLANKNOTING]

"Dirk Niblick's Show"

Coming Soon....

[hemanshera777]

there's gotta be more Dirk Niblik cartoons than this and the one that talks about the graphs

[BuckWilliams17]

Even better in my opinion.

[TheKaveInn]

where are shows like this today? and we wonder why kids are retarded watching tv trash

[ComradeSephiroth]

Here's a challenge. Let x = 10 and then use quadratic polynomials to prove this trick for any coefficients a, b, c. (Hint: the truism 1x^2 = 9x + 10 is helpful when you try to "borrow".)

[nrwilliams015]

@ComradeSephiroth here's also something to think about. are u familiar with the 2x-1 rule for determining square roots of the next number, or rather how much to add to get the next number? example: 1 to 4: 2 ( 2) -1=3 1+3=4 or 1^2 to 2^2.

2(3) -1= 5. 3^2 = 9, 4+5 = 9.

2(4) -1= 7. 4^2 =16, 9+7 = 16

2(5) -1= 9 . 5^2= 25, 16+9=25

I think u get the picture.

[wschmrdr]

UNLESS the ones digit is 0....... then the answer is 0.

[BeatlesAmiYumi]

When it comes to cartoons that teach different kinds of math skills, Dirk Niblick is one of the best!

[girlsixdiva]

Who in the hell came up with this trick?? OMG those ancient mathematicians and their tricks!!! I guess all they had to do back then was think of mathematical equations! LOL

[DimeraFan28]

Wow. Another Interesting Dirk Cartoon. I Wonder If Anyone Has An Episode Of His Mom Talking To Dirk About Her Favorite TV Show Mathnet. So If Anyone Has Any Clips Of That Episode Put It On Here.

[mightyfilm]

An amazing little fact is that you can see the influence of Roger Ramjet in the series, mainly due to the writer of the previous, Jim Thurman, would later go onto work for Children's Television Workshop.

[ACcountryFan]

Also, Dirk and Roger share the same voice actor: radio legend Gary Owens. :)

[WorldCollections]

Yea ! and 9/99 = 99/999 = 999/9999 This is the good stuff of pure mathematics !

[Wheeloffortunefan999]

"don't fall into the river while you're playing bridge!, i guess she had to go" hahaha

[Wheeloffortunefan999]

does any1 have the math brigade episode where fluff and fold noodleman were sold a record store for $1,000?

[Wheeloffortunefan999]

"shoot" LOLOL!

[Lilaan]

Agreed!

[Wheeloffortunefan999]

that's right, i just did that in my head

[shadyparadox]

I got zero.

=D

[opinionhead444]

And the reason this works is because of the multiples of 99.

Assume 100x + 10y + z the larger three digit number

100z + 10y + x

100x + 10y + z - (100z + 10y + x) = 99(x - z).

Q.E.D.

[linzzey]

i'm not sure i get this, i chose 134 and nowhere in the middle do i have a 9? could you explain it to me!

[opinionhead444]

I think when you reversed it...you reversed 4 and 3 to 143. When you reverse it you should get 431. So, 431-134 = 297 = 99(4-1) = 99 * 3.

The reason you use 4 & 1 is because they are the first and last digits of the larger number 431.

[ComradeSephiroth]

I used a slightly different method to prove it. Basically, a three digit number can be written as ax^2 + bx + c, where x = 10. Then reverse the coefficients and subtract, assuming that c < a. You should, after doing two-column borrowing get the result = (a - 1 - c)x^2 + 9x + (c + 10 - a). Adding the first and last resultant coefficients together, all variables cancel out.

[nrwilliams015]

@ComradeSephiroth whew! I ain't kno what the fauk u was doing at first, but u basically cancelled a and c. and u were basically using ax2 + bx + c = 0 thing, right!

[nrwilliams015]

@opinionhead444 and it's true with the fact that it's also kin to 9. u can try this with any number (except with 3 dight numbers, the value will be 99 or a number kin to 99 illustrated here) but with any number and subtract its reverse value will give you a multiple of 9.

example: 1801-1081 = 720 (a niner) or 27852-25872 = 180 see what I mean?

[zackman86]

Dirk Niblick...voiced by gary owens...man square one brings back memories...

[DragonLord1975]

That trick is EASY!

[bailorg]

Wow. Because of this video I realized I had forgotten how to do multi-digit subtraction by hand. Thankfully I quickly retaught myself.