{"id":5393,"date":"2021-11-07T03:43:42","date_gmt":"2021-11-07T03:43:42","guid":{"rendered":"https:\/\/robertjwallace.com\/?p=5393"},"modified":"2025-03-17T19:50:38","modified_gmt":"2025-03-17T19:50:38","slug":"mental-math-prediction","status":"publish","type":"post","link":"https:\/\/robertjwallace.com\/es\/mental-math-prediction\/","title":{"rendered":"Predicci\u00f3n de c\u00e1lculo mental"},"content":{"rendered":"

This is the prediction of a number from the addition of a series of numbers. It is based on a mathematical principal that I have adapted to a deck of cards. To learn about the principal see https:\/\/www.youtube.com\/watch?v=AZRD5UkAm2Y<\/a>. <\/p>\n\n\n\n

This effect requires a setup to a deck of cards. First remove all of the court cards (K,Q, and Js) and tens and set them aside. Now take the remaining cards and make four sets of three cards, each set adding up to 18. For example, one set may consist of a nine, two, and seven. When those values are added up, they total 18.<\/p>\n\n\n\n\n\n\n\n

Here are four sets for example:<\/p>\n\n\n\n

seven, five, and six<\/p>\n\n\n\n

eight, nine, and ace<\/p>\n\n\n\n

seven, four, and seven<\/p>\n\n\n\n

nine, three and six<\/p>\n\n\n\n

\"\"
Fig. 1: Each column of three adds to 18<\/figcaption><\/figure>\n\n\n\n

Note that the order of the three cards doesn’t matter.<\/p>\n\n\n\n

Now choose four more number cards, these will be your prediction. Using the mathematical principal the predicted number will be the number two followed by the four number cards, minus two.<\/p>\n\n\n\n

For example, if you chose the cards, five, two, seven, and six; then the prediction value would be 25,274.<\/p>\n\n\n\n

Place these cards, in order, in each set of three, so that the inserted cards are the third card in each set:<\/p>\n\n\n\n

\"\"
Fig. 2: Here are the prediction cards (5,2,7,6) inserted into the sets.<\/figcaption><\/figure>\n\n\n\n

Now pick up the cards starting at the lower right (6H), from right to left, each row, so that if you were to deal the cards out as in a game of cards, they would come out as pictured above.<\/p>\n\n\n\n

Now you are going to assemble all of the cards together. You should have three sets of cards. The court cards (K,Q,J, and tens) that you removed. The cards that you just stacked, and the remaining number cards. With the court cards face up, add ten of the remaining number cards to them. Place the remaining ten cards on the face up stack. Now place the the half with the court cards on top of the face up cards containing your stack. Turn the whole deck face down and put them back in the card box.<\/p>\n\n\n\n

This sounds like a lot of work, but it actually goes very fast. Below is a picture of the whole deck, stacked.<\/p>\n\n\n\n

\"\"
Fig 3: The complete deck stacked.<\/figcaption><\/figure>\n\n\n\n

If you look at the picture you can see the sixteen cards stacked at the top, beginning with the seven of spades and ending with the six of hearts. The court cards start at location 27.<\/p>\n\n\n\n

Place the deck in the card box and you are ready to perform.<\/p>\n\n\n\n

To perform, take the cards out and perform a couple of false shuffles and\/or cuts as you talk about predictions. Then cut the deck in half, which is easy to do by splitting the deck at the court card in the middle. Set the two halves on the table and ask the spectator to shuffle them together, with a single riffle shuffle.<\/p>\n\n\n\n

All this shuffle will do is distribute the court cards among your stacked cards, as long as the shuffle is even. If you are worried, you can do this shuffle instead of the spectator. Just be sure that only the court cards inter-weave with your stack. This step isn’t necessary, if you want you can simple insert some court cards into your stack and omit this shuffle.<\/p>\n\n\n\n

Explain that you are going to form some number by dealing out the cards into four rows, each row with four cards. Explain that since these are going to form numbers, court cards and tens will not be used, and if they show up during the deal they will be discarded.<\/p>\n\n\n\n

Deal the cards, discarding the court cards and tens as you come to them and you will end up with the cards appearing as in figure two. Explain that these represent four, four digit numbers. In this example they represent 7,879; 5,943; 5,276; and 6,169.<\/p>\n\n\n\n

Tell the spectator that they are going to add up the numbers, but that you want them to further randomize the values by shifting the columns up or down as they please. For example they could shift the second column up one card, and the fourth column down two cards giving them the following:<\/p>\n\n\n\n

\"\"
Fig. 4: Cards shifted.<\/figcaption><\/figure>\n\n\n\n

They have a free choice of how to shift the columns. Explain that the spaces represent zeros, and thus, with the cards shifted as figure 4, they have made the numbers:<\/p>\n\n\n\n

0800
7970
5240
5179
6073
0006
0006<\/p>\n\n\n\n

Have them take out their phone and add up those numbers using their calculator. The total will be your predicted number: 25,274.<\/p>\n\n\n\n

I will often start with the prediction written on the card box with a sharpie before I begin, and I place the box on the table with the prediction face down when I remove the deck.<\/p>","protected":false},"excerpt":{"rendered":"

This is the prediction of a number from the addition of a series of numbers. It is based on a mathematical principal that I have adapted to a deck of cards. To learn about the principal see https:\/\/www.youtube.com\/watch?v=AZRD5UkAm2Y. This effect requires a setup to a deck of cards. First remove all of the court cards … <\/p>\n

Continuar leyendo “Mental Math Prediction”<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_eb_attr":"","footnotes":""},"categories":[7,159],"tags":[],"class_list":["post-5393","post","type-post","status-publish","format-standard","hentry","category-magic","category-self-working"],"featured_image_src":null,"featured_image_src_square":null,"author_info":{"display_name":"Bob","author_link":"https:\/\/robertjwallace.com\/es\/author\/admin\/"},"_links":{"self":[{"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/posts\/5393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/comments?post=5393"}],"version-history":[{"count":2,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/posts\/5393\/revisions"}],"predecessor-version":[{"id":5402,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/posts\/5393\/revisions\/5402"}],"wp:attachment":[{"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/media?parent=5393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/categories?post=5393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/robertjwallace.com\/es\/wp-json\/wp\/v2\/tags?post=5393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}