If your strategy to remember the number sequences involved linking the numbers to information already in your long-term storage, you used rehearsal.

Elaborative rehearsal

Explanation:

Elaborative rehearsal is process in which we transfer information from short term memory into the long term memory after which we can use this information in the future. If one has this information stored in long term memory they can relate it to new concepts so that they can grasp the new concept.

Elaborative rehearsal is a more complex process because we use our pre-existing information to recall concepts in short term Memory.

Mnemonics are useful in creating this memory where we use things like symbols or letter to easily recall Information, for example if you want to learn the planets and you take all their first letters and create a sequence that you can remember when you want to recall them in the future.

answer; engram;