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  2. 17-animal inheritance puzzle - Wikipedia

    en.wikipedia.org/wiki/17-animal_inheritance_puzzle

    The 17-animal inheritance puzzle is a mathematical puzzle involving unequal but fair allocation of indivisible goods, usually stated in terms of inheritance of a number of large animals (17 camels, 17 horses, 17 elephants, etc.) which must be divided in some stated proportion among a number of beneficiaries.

  3. List of smart cities - Wikipedia

    en.wikipedia.org/wiki/List_of_smart_cities

    The Institute for Management Development and Singapore University of Technology and Design rank cities in the Smart City Index according to technological, economic and human criteria (e.g., the quality of life, the environment and inclusiveness). In the Smart City Index 2023, the top 15 smart cities were, in order, Zürich, Oslo, Canberra ...

  4. List of countries by population (United Nations) - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    Statistical subregions as defined by the United Nations Statistics Division [1] This is a list of countries and other inhabited territories of the world by total population, based on estimates published by the United Nations in the 2024 revision of World Population Prospects. It presents population estimates from 1950 to the present. [2]

  5. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    For example, if s=2, then 𝜁(s) is the well-known series 1 + 1/4 + 1/9 + 1/16 + …, which strangely adds up to exactly 𝜋²/6. When s is a complex number—one that looks like a+b𝑖, using ...

  6. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  7. List of countries by percentage of population living in ...

    en.wikipedia.org/wiki/List_of_countries_by...

    The first table lists countries by the percentage of their population with an income of less than $2.15 (the extreme poverty line), $3.65 and $6.85 US dollars a day in 2017 international prices. The data is from the most recent year available from the World Bank API.

  8. List of sovereign states - Wikipedia

    en.wikipedia.org/wiki/List_of_sovereign_states

    The following is a list providing an overview of sovereign states around the world with information on their status and recognition of their sovereignty. The 205 listed states can be divided into three categories based on membership within the United Nations System : 193 UN member states , [ 1 ] two UN General Assembly non-member observer ...

  9. List of WLAN channels - Wikipedia

    en.wikipedia.org/wiki/List_of_WLAN_channels

    Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.