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  2. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    The Trachtenberg system is a system of rapid mental calculation.The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly.

  3. Prisons in South Africa - Wikipedia

    en.wikipedia.org/wiki/Prisons_in_South_Africa

    The Zonderwater Prison, Cullinan, Gauteng. Prisons in South Africa are run by the Department of Correctional Services.The department is divided into six administrative regions, each with its own regional commissioner, and subdivided into multiple areas, each headed by an area commissioner. [1]

  4. Identification of inmates in Nazi concentration camps

    en.wikipedia.org/wiki/Identification_of_inmates...

    Metal stamps turned out to be impractical, and later numbers were tattooed with a single needle on the left forearm. The tattoo was the prisoner's camp entry number, sometimes with a special symbol added: some Jews had a triangle, and Romani had the letter "Z" (from German Zigeuner for "Gypsy"). In May 1944, the Jewish men received the letters ...

  5. Yemen's Houthis free more than 100 prisoners - AOL

    www.aol.com/news/yemens-houthis-free-more-100...

    Yemen's Houthi group freed more than 100 detainees in Sanaa on Sunday, calling the move a "unilateral humanitarian initiative" to pardon prisoners and return them to their families. "Most of them ...

  6. Divisibility rule - Wikipedia

    en.wikipedia.org/wiki/Divisibility_rule

    Answer: 7 × 1 + 6 × 10 + 5 × 9 + 4 × 12 + 3 × 3 + 2 × 4 + 1 × 1 = 178 mod 13 = 9 Remainder = 9 A recursive method can be derived using the fact that = and that =. This implies that a number is divisible by 13 iff removing the first digit and subtracting 3 times that digit from the new first digit yields a number divisible by 13.

  7. Division (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Division_(mathematics)

    In terms of partition, 20 / 5 means the size of each of 5 parts into which a set of size 20 is divided. For example, 20 apples divide into five groups of four apples, meaning that "twenty divided by five is equal to four". This is denoted as 20 / 5 = 4, or ⁠ 20 / 5 ⁠ = 4. [2] In the example, 20 is the dividend, 5 is the divisor, and 4 is ...

  8. She endured a traumatic cavity search when visiting a ... - AOL

    www.aol.com/news/she-endured-traumatic-cavity...

    The ordeal began on a September morning in 2019 when she said she drove four hours to visit her husband, Carlos Eugene Cardenas, who is in prison in Tehachapi for armed robbery.

  9. 100 prisoners problem - Wikipedia

    en.wikipedia.org/wiki/100_prisoners_problem

    Prisoner 1 first opens drawer 1 and finds number 7. Then they open drawer 7 and find number 5. Then they open drawer 5, where they find their own number and are successful. Prisoner 2 opens drawers 2, 4, and 8 in this order. In the last drawer they find their own number, 2. Prisoner 3 opens drawers 3 and 6, where they find their own number.