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2. Multiplication table - Wikipedia

   en.wikipedia.org/wiki/Multiplication_table

   Multiplication table. In mathematics, a multiplication table (sometimes, less formally, a times table) is a mathematical table used to define a multiplication operation for an algebraic system. The decimal multiplication table was traditionally taught as an essential part of elementary arithmetic around the world, as it lays the foundation for ...

3. Timeline for the day of the September 11 attacks - Wikipedia

   en.wikipedia.org/wiki/Timeline_for_the_day_of...

   8:50 – 8:54 (approx.): Flight 77 is hijacked above southern Ohio, turning to the southeast. The transponder is turned off by hijacker-pilot Hani Hanjour. 9:03:02: Flight 175 crashes into the south face of the South Tower (2 WTC) of the World Trade Center, between floors 77 and 85.

4. Timeline of the September 11 attacks - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_the_September...

   8:42–8:46: United States airspace Flight 175 is hijacked. 8:46:40: North Tower, World Trade Center, New York City, New York: Flight 11 crashes into the North Tower of the World Trade Center between the 93rd and 99th floors. 8:50–8:54: United States airspace Flight 77 is hijacked. 9:03:02 [48] South Tower, World Trade Center, New York City ...

5. Casualties of the September 11 attacks - Wikipedia

   en.wikipedia.org/wiki/Casualties_of_the...

   The September 11 attacks were the deadliest terrorist attacks in human history, causing the deaths of 2,996 people, including 2,977 victims and 19 hijackers who committed murder–suicide. Thousands [a] more were injured, [3][4] and long-term health effects have arisen as a consequence of the attacks. New York City took the brunt of the death ...

6. Multiplication sign - Wikipedia

   en.wikipedia.org/wiki/Multiplication_sign

   The multiplication sign (×), also known as the times sign or the dimension sign, is a mathematical symbol used to denote the operation of multiplication, which results in a product. [ 1 ] The symbol is also used in botany , in botanical hybrid names and the heavy goods vehicle industry, to calculate the amount of powered wheels.

7. Universal Numbering System - Wikipedia

   en.wikipedia.org/wiki/Universal_Numbering_System

   This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart. The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [1][2] Most of the rest of the world uses the FDI World Dental Federation ...

8. Mathematical operators and symbols in Unicode - Wikipedia

   en.wikipedia.org/wiki/Mathematical_operators_and...

   The Supplemental Mathematical Operators block (U+2A00–U+2AFF) contains various mathematical symbols, including N-ary operators, summations and integrals, intersections and unions, logical and relational operators, and subset/superset relations. Supplemental Mathematical Operators [1] Official Unicode Consortium code chart (PDF) 0.

9. Dental notation - Wikipedia

   en.wikipedia.org/wiki/Dental_notation

   The FDI World Dental Federation notation ("FDI notation" or "ISO 3950" [1]) is widely used by dental professionals internationally to identify and describe a specific tooth. The FDI notation uses a two-digit numbering system in which the first digit represents a tooth's quadrant and the second digit represents the number of the tooth from the ...