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  2. Skip counting - Wikipedia

    en.wikipedia.org/wiki/Skip_counting

    Skip counting is a mathematics technique taught as a kind of multiplication in reform mathematics textbooks such as TERC. In older textbooks, this technique is called counting by twos (threes, fours, etc.). In skip counting by twos, a person can count to 10 by only naming every other even number: 2, 4, 6, 8, 10. [1]

  3. Franklin (TV series) - Wikipedia

    en.wikipedia.org/wiki/Franklin_(TV_series)

    His television stories and books always begin, "(Franklin) could count by twos and tie his shoes". He goes to school, lives in a small village called Woodland with his friends, and has many adventures playing and learning in the world around him, sometimes with the helping hand of an adult such as his parents, Mr. and Mrs. Turtle.

  4. Calculation (card game) - Wikipedia

    en.wikipedia.org/wiki/Calculation_(card_game)

    The tableau, initially empty, consists of four piles of cards, usually arranged immediately below the four foundations.. Play in Calculation is simple. A single card is turned up from the stock and played either to the top of any of the four tableau piles, or onto one of the foundations if desired.

  5. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.

  6. Multiplicity (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Multiplicity_(chemistry)

    However the multiplicity equals the number of spin orientations only if S ≤ L. When S > L there are only 2L+1 orientations of total angular momentum possible, ranging from S+L to S-L. [2] [3] The ground state of the nitrogen atom is a 4 S state, for which 2S + 1 = 4 in a quartet state, S = 3/2 due to three unpaired electrons. For an S state ...

  7. Finger-counting - Wikipedia

    en.wikipedia.org/wiki/Finger-counting

    Finger-counting can serve as a form of manual communication, particularly in marketplace trading – including hand signaling during open outcry in floor trading – and also in hand games, such as morra. Finger-counting is known to go back to ancient Egypt at least, and probably even further back. [Note 1]

  8. Double counting (proof technique) - Wikipedia

    en.wikipedia.org/wiki/Double_counting_(proof...

    Where double counting involves counting one set in two ways, bijective proofs involve counting two sets in one way, by showing that their elements correspond one-for-one. The inclusion–exclusion principle , a formula for the size of a union of sets that may, together with another formula for the same union, be used as part of a double ...

  9. Sieve of Eratosthenes - Wikipedia

    en.wikipedia.org/wiki/Sieve_of_Eratosthenes

    Sieve of Eratosthenes: algorithm steps for primes below 121 (including optimization of starting from prime's square). In mathematics, the sieve of Eratosthenes is an ancient algorithm for finding all prime numbers up to any given limit.

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