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  2. Mnemonic peg system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_peg_system

    It associates all numbers 00-99 with a distinctive person, action and object. Any six-digit number can be memorized by using the person assigned the first two digits, the action of the next two digits and the object of the third. [3] For example: The number 34 could be Frank Sinatra. 13 could be the action of kicking. 79 could be a cape.

  3. Narcissistic number - Wikipedia

    en.wikipedia.org/wiki/Narcissistic_number

    In number theory, a narcissistic number [1] [2] (also known as a pluperfect digital invariant (PPDI), [3] an Armstrong number [4] (after Michael F. Armstrong) [5] or a plus perfect number) [6] in a given number base is a number that is the sum of its own digits each raised to the power of the number of digits.

  4. 6174 - Wikipedia

    en.wikipedia.org/wiki/6174

    All other four-digit numbers eventually reach 6174 if leading zeros are used to keep the number of digits at 4. For numbers with three identical digits and a fourth digit that is one higher or lower (such as 2111), it is essential to treat 3-digit numbers with a leading zero; for example: 2111 – 1112 = 0999; 9990 – 999 = 8991; 9981 – 1899 ...

  5. Dreams in analytical psychology - Wikipedia

    en.wikipedia.org/wiki/Dreams_in_analytical...

    Thus, in his seminar notes of 1936 and 1937, forming the first part of his synthesis work On the Interpretation of Dreams, he draws up a historical panorama ranging from Artemidorus of Daldis (2nd c.) with his Five Books on the Art of Interpreting Dreams, to Macrobius (b. c. 370), through his Commentary on the Dream of Scipio, and Synesios of ...

  6. Dream interpretation - Wikipedia

    en.wikipedia.org/wiki/Dream_interpretation

    [1] [4] [5] First, Gilgamesh himself has two dreams foretelling the arrival of Enkidu. [1] In one of these dreams, Gilgamesh sees an axe fall from the sky. The people gather around it in admiration and worship. Gilgamesh throws the axe in front of his mother Ninsun and then embraces it like a wife. Ninsun interprets the dream to mean that ...

  7. False awakening - Wikipedia

    en.wikipedia.org/wiki/False_awakening

    A classic example in fiction is the double false awakening of the protagonist in Gogol's Portrait (1835). Studies have shown that false awakening is closely related to lucid dreaming that often transforms into one another. The only differentiating feature between them is that the dreamer has a logical understanding of the dream in a lucid dream ...

  8. Arithmomania - Wikipedia

    en.wikipedia.org/wiki/Arithmomania

    Other examples include counting tiles on the floor or ceiling, the number of lines on the highway, or touching things a certain number of times such as a door knob or a table. Arithmomania sometimes develops into a complex system in which the person assigns values or numbers to people, objects and events in order to deduce their coherence.

  9. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    If one has a two-digit number, take it and add the two numbers together and put that sum in the middle, and one can get the answer. For example: 24 x 11 = 264 because 2 + 4 = 6 and the 6 is placed in between the 2 and the 4. Second example: 87 x 11 = 957 because 8 + 7 = 15 so the 5 goes in between the 8 and the 7 and the 1 is carried to the 8.