16. Pinfruit

Pinfruit
pinfruit.com

This is one of the few tools on the Internet that will help you to memorize strings of numbers. You have to memorize a number of numbers and letters, such as the number 2 is represented by the letter "n." Enter the string of numbers and it gives you words to represent the numbers. Pick the words that help form a memorable sentence, and then use the first letters to help you recall the string of numbers.

Mindtools
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