Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to memorize the perfect squares in math [title] Get a stack of index cards. [step] You will need one for as many perfect squares you want to memorize. Start simple with 10 cards, then add another 10 as your memory improves.

Ending1: [substeps] Make sure that the drawing cards you use are clearly marked. For example, you might have the joker, jack, and queen. Ending2: [substeps] Note that you will also need 8 cards for each square. Which edge does the edge of a square come from? Think of in terms of how a standard square looks. Ending3: You don't need to get the whole stack you started with back to back! You will be using 5 of these, so round up the scores accordingly. [substeps] As with all other math assignments, it's best to be sure to have at least 5 cards and just choose cards that you like. Ending4: [title] Write the root numbers on the front of the card. [step] Make the numbers large enough to read from a few feet away.

Answer format: ending1/ending2/ending3/ending4