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MrScorpio

(73,630 posts) Thu Mar 28, 2013, 10:30 PM Mar 2013

And when you add the two digits together you get, you guessed it, the number NINE!

Nine is magic!

8 replies

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And when you add the two digits together you get, you guessed it, the number NINE! (Original Post) MrScorpio Mar 2013 OP

I figured that out for myself Art_from_Ark Mar 2013 #1

Same here MrScorpio Mar 2013 #2

And the order of the digits in the product reverse in rising sequence. Aristus Mar 2013 #3

8 & 1 In_The_Wind Mar 2013 #4

Number nine, number nine, number nine, number nine, number nine... bluesbassman Mar 2013 #5

My grandfather showed this to me in 1955. Ptah Mar 2013 #6

Sad story. Arctic Dave Mar 2013 #7

My math teacher actually DID teach me that - and I still use the checksum. talkingmime Mar 2013 #8

Art_from_Ark

(27,247 posts)

1. I figured that out for myself

Reply to MrScorpio (Original post)

Thu Mar 28, 2013, 10:35 PM

Mar 2013

back in the 3rd grade or so.

And all numbers whose digits add up to multiples of 3, are divisible by 3. And all even numbers like that, are divisible by 6 as well

MrScorpio

(73,630 posts)

2. Same here

Reply to Art_from_Ark (Reply #1)

Thu Mar 28, 2013, 10:40 PM

Mar 2013

The person who made this must have had a shitty math teacher

Aristus

(66,294 posts)

3. And the order of the digits in the product reverse in rising sequence.

Reply to MrScorpio (Original post)

Thu Mar 28, 2013, 10:44 PM

Mar 2013

That's a cool thing I noticed years ago...

In_The_Wind

(72,300 posts)

4. 8 & 1

Reply to MrScorpio (Original post)

Thu Mar 28, 2013, 10:46 PM

Mar 2013

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bluesbassman

(19,361 posts)

5. Number nine, number nine, number nine, number nine, number nine...

Reply to MrScorpio (Original post)

Thu Mar 28, 2013, 11:33 PM

Mar 2013

Ptah

(33,021 posts)

6. My grandfather showed this to me in 1955.

Reply to MrScorpio (Original post)

Thu Mar 28, 2013, 11:41 PM

Mar 2013

Arctic Dave

(13,812 posts)

7. Sad story.

Reply to MrScorpio (Original post)

Fri Mar 29, 2013, 01:04 AM

Mar 2013

When i moved to a new school district my junior year in high school they lost all my school transcripts and I had to take ALL remedial courses for a semester. Reading, Math, English.

They were teaching this in the class. Sad part, there were kids in the class that could not do basic math. Same thing in the other classes.

talkingmime

(2,173 posts)

8. My math teacher actually DID teach me that - and I still use the checksum.

Reply to MrScorpio (Original post)

Fri Mar 29, 2013, 10:44 AM

Mar 2013

I taught it to my kids when they were practicing the tables.

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