Here's a challenge: memorize all the prime numbers up to 10,000.

One possible way to do it:

Take every prime number image and then set it on fire. 7043 for me is an axe chopping up a suit of armor. I could just set that compound image on fire. Then when asked if a number is prime, I could just check whether it had been set on fire. Repetition would cement the image modifiers...

I like Simon L's analogy that he used for his memory system, that could also apply to this memory challange:

Let's say you have 10 coins in each of ten boxes. On each of these 100 coins, there is a different date. Let's say in the first box you pick a coin with the date 1978 on it. Now, instead of memorizing the number, you just toy with the coin until it gets slightly heated up with your body heat. Now, you do this with one coin in each of the ten boxes. Once finished you can go back to your first box and touch all your coins. The one that is slightly warmer than the others is the coin you have memorized.

If anyone attempts this, please leave a comment below! :)

I've marked the level of this challenge as "intermediate", because it requires a working mnemonic system for numbers.

I think this is an interesting challenge.

And how many numbers is this?

less than 10: 4

less than 100: 25

less than 1,000: 168

less than 10,000: 1,229

greetings everybody

i think we can use loci

use a big zoo

and house in them all these prime numbers interacting with animals.......

That's a great idea. The Vienna Zoo has a nice map with some loci on it already... :)

http://www.zoovienna.at/media/uploads/dokumente/lageplanfolder_e_sommer_...

I might try that on a weekend...

I like that idea, but if I've never been to the Vienna Zoo, how would this map help me?

Here is how to do this:

Knowledge Needed:

A 100 PAO System

Basic number theory knowledge (explained)

How to memorize primes between 10 and 100

1) Every Prime number greater than 5, has a 1's place value of either 1, 3, 7 or 9.

2)Choose a poem to be memorized.

3)Attach your PAO image for 01 to this poem (this will serve as an index signifying this poem represents 10's)

4) Label 9 2x2 Matrices with first row (left to right) 1, 7 and bottom row 3, 9

a) for primes between 10 and 20 color in all four squares of the First matrix ( this signifies that 11, 17, 13 and 19 are Prime)

b) for primes between 20 and 30 color in the bottom row of your second matrix ( 23, and 29 are prime)

5) Finish coloring in the rest of your matrices as mentioned above, 3rd for 30's, 4 for 40's and so on

6) In numerical order attach each matrix to a word in your poem, make it simple and use the meter and rhyme to your advantage

7) Repeat this with all 100 of your PAO images attached to 100 poems with 10 matrices in each poem

Hope this helps

Edutopia