Thread: Totally random...

This is just a totally random thing that hopefully will make you say "wow! i didnt know that."

111,111,111 x 111,111,111 = 12,345,678,987,654,321

Wow! I didn't THINK about that.

I knew that.

Hmm, that's good, I've never seen that one... But it has a very simple mathematical explanation.... (I put the zeros on the left to show them lined up)

Imagine numbers multiplied....

00000000111111111
00000000111111111 x
___________________
00000000111111111 +
00000001111111110 +
00000011111111100 +
00000111111111000 +
00001111111110000 +
00011111111100000 +
00111111111000000 +
01111111110000000 +
11111111100000000 +
___________________
12345678987654321

etc... so every time, you are extending to the left, adding one more number to every column. The middle will have 9, and each column going away from it will have one less. The same way that 111,111 x 111,111 = 12,345,654,321.

I hate math.
-Fantom

Math scares me! This particular math problem isn't so hard to comprehend. But so much is currently far beyond by scope. I'm not writing myself off though. Though when it's broken up the way you did Fantom, it's not so elusive and scarey. Some people may marvel at how one can get their head around a language or weave their fingers around a piano and make songs from scratch. But me, I can't get my head around a Rubic's cube. Many people seem to be able to do it, but it's a total blind spot for me. It's been a goal of mine to one day at least know the general idea of how to do the Rubic's cube. I don't need to complete it. I just want to be unconfused by it, and to have the general intelligence required to interpret what's going on there. One day, I'll get there. Blind spots in the mind are so weird. They freak me out .

I have always been able to understand Math right away... I guess everyone has their talent. I took 8 semesters of Calc in college (Computer Science Major), and mind puzzles and math problems just make sense to me.
Russian, however, is kicking my arse! I'm not used to dealing with something that just makes sense after a while, but instead takes years of experience and practice! Even Spanish was fairly easy to understand, since it's a lot more similar to English (read: NO DECLENSIONS!)
-Fantom

Dude, I suck at Rubik's cubes too, and I'm in a pretty math-intensive major. I'm not too good at puzzles or anything, actually I don't really like math at all, but I can do it.

1+1=1

No Zhenya, you fool! , 1 + 1 = 11. Everyone knows that.
And 7 - 11 = the quicky-mart.

i still think that 1+1=1

That's an easy one, 1 OR 1 = 1 + 1 = 1
1 OR 0 = 1 + 0 = 1

I remember when we did imaginary numbers at school, based on square root -1 = i

One of my favorites (computer programmer, keep in mind) is:

There are 10 types of people in the world: Those who understand Binary Code, and those who don't.

-Fantom

You're all wrong! 1 + 1 = 10!

i still think that 1+1=1

In fact, you're right in a way: A+A=A is called a tautology(animals+animals=animals for example). But it is not applicable to numbers...

I wasn't talking about that!

I suspected it a bit...
But I was tired and wanted to post something "totally random" before going to bed

In fact, you're right in a way: A+A=A is called a tautology(animals+animals=animals for example). But it is not applicable to numbers...

1+1=1 is still valid, where 1 represents a true result. For example if we talk about the outcome of an OR gate, or simply the truth table of this operator.

By the way, with only one stroke, make the equation below true:

5 + 5 + 5 = 550

Originally Posted by Jca

By the way, with only one stroke, make the equation below true:

5 + 5 + 5 = 550

Two possibilities, the first is to make the = sign into a ≠sign, i.e. five plus five plus five does not equal 550, but that's a 'trivial' answer. The answer that you're looking for of course is that you connect the left and top branches of one of the plus signs to make a four:

/+ ----> 4

545 + 5 = 550 or 5 + 545 = 550

Add a puddle of water to a puddle of water, and you have a larger one.