Random Number Generators for Memory Training

I've created a couple of quick pages that generate 5000 random numbers for practicing memory techniques. Here they are in two easily-printable versions:

Here are some random numbers chunked in 3s (decimal) and 10s (binary) to help learning to see "words" in the numbers:

Here are pages with each number displayed only once. Copy them into a word processor and print:

2,652 card pairs:

(52*52=2,704, but a deck of playing cards doesn't have 2 of the same cards, so it appears that there are only 52*52-52=2,652 card pairs in one deck of cards. E.g., there aren't two Aces of Spades or two Queen of Clubs.)