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  2. Month - Wikipedia

    en.wikipedia.org/wiki/Month

    A month is a unit of time, used with calendars, that is approximately as long as a natural phase cycle of the Moon; the words month and Moon are cognates.The traditional concept of months arose with the cycle of Moon phases; such lunar months ("lunations") are synodic months and last approximately 29.53 days, making for roughly 12.37 such months in one Earth year.

  3. Triangular number - Wikipedia

    en.wikipedia.org/wiki/Triangular_number

    The final digit of a triangular number is 0, 1, 3, 5, 6, or 8, and thus such numbers never end in 2, 4, 7, or 9. A final 3 must be preceded by a 0 or 5; a final 8 must be preceded by a 2 or 7. In base 10, the digital root of a nonzero triangular number is always 1, 3, 6, or 9. Hence, every triangular number is either divisible by three or has a ...

  4. Happy number - Wikipedia

    en.wikipedia.org/wiki/Happy_number

    The palindromic prime 10 150006 + 7 426 247 × 10 75 000 + 1 is a 10-happy prime with 150 007 digits because the many 0s do not contribute to the sum of squared digits, and 1 2 + 7 2 + 4 2 + 2 2 + 6 2 + 2 2 + 4 2 + 7 2 + 1 2 = 176, which is a 10-happy number. Paul Jobling discovered the prime in 2005.

  5. Lucas number - Wikipedia

    en.wikipedia.org/wiki/Lucas_number

    The sequence also has a variety of relationships with the Fibonacci numbers, like the fact that adding any two Fibonacci numbers two terms apart in the Fibonacci sequence results in the Lucas number in between. [3] The first few Lucas numbers are 2, 1, 3, 4, 7, 11, 18, 29, 47, 76, 123, 199, 322, 521, 843, 1364, 2207, 3571, 5778, 9349, ... .

  6. List of televised academic student quiz programs - Wikipedia

    en.wikipedia.org/wiki/List_of_televised_academic...

    Student quiz shows have appeared on television as both local and national programs since the second half of the 20th century. The following is a list of quiz programs that have aired on local or national television, featuring teams from schools, colleges, or universities in academic competition.

  7. Twenty questions - Wikipedia

    en.wikipedia.org/wiki/Twenty_questions

    Other versions specify that the item to be guessed should be in a given category, such as actions, occupations, famous people, etc. In Hungary a similar game is named after Simon bar Kokhba. A version of twenty questions called yes and no is played as a parlor game by characters in Charles Dickens' A Christmas Carol.

  8. Ghana National Science and Maths Quiz - Wikipedia

    en.wikipedia.org/wiki/Ghana_National_Science_and...

    The current quiz mistress is Dr. Elsie Effah Kaufmann. Presently, every contest is composed of five rounds with the following rules: Round 1 — The round of fundamental questions. Each contesting school has to answer 4 Biology, 4 Chemistry, 4 Physics and 4 Mathematics questions. A wrongly answered question may be carried over as a bonus.

  9. Attic calendar - Wikipedia

    en.wikipedia.org/wiki/Attic_calendar

    The political months had no name but were numbered and given in conjunction with the name of the presiding tribe (which, as determined by lot at the expiry of their predecessors' term, gave no clue as to the time of year). The days were numbered with a straightforward sequence, running from 1 to the total number of days for that month.