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2. Sieve of Pritchard - Wikipedia

   en.wikipedia.org/wiki/Sieve_of_Pritchard

   Now form wheel 3 with length 5 × 6 = 30 by first extending wheel 2 up to 30 and then deleting 5 times each number in wheel 2 (in reverse order!), to get 1 2 3 5 7 11 13 17 19 23 25 29. The first number after 1 for wheel 3 is 7; note it as a prime. Now wheel 4 has length 7 × 30 = 210, so we only extend wheel 3 up to our limit 150. (No further ...

3. Multiplication table - Wikipedia

   en.wikipedia.org/wiki/Multiplication_table

   Multiplication table from 1 to 10 drawn to scale with the upper-right half labeled with prime factorisations. 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.

4. Pinwheel calculator - Wikipedia

   en.wikipedia.org/wiki/Pinwheel_calculator

   The teeth are moved by a second wheel located inside the first and moved by a side lever. A pinwheel calculator is a class of mechanical calculator described as early as 1685, and popular in the 19th and 20th century, calculating via wheels whose number of teeth were adjustable.

5. Napier's bones - Wikipedia

   en.wikipedia.org/wiki/Napier's_bones

   The method was based on lattice multiplication, and also called rabdology, a word invented by Napier. Napier published his version in 1617. [1] It was printed in Edinburgh and dedicated to his patron Alexander Seton. Using the multiplication tables embedded in the rods, multiplication can be reduced to addition operations and division to ...

6. How to Get Rid of Blisters, According to Doctors - AOL

   www.aol.com/rid-blisters-according-doctors...

   Doctors explain a few ways to get rid of blisters quickly and how to prevent them in the future.

7. Trump invites China's Xi to inauguration, experts call it ...

   www.aol.com/news/trump-invites-chinas-xi-other...

   By Steve Holland and David Brunnstrom. WASHINGTON (Reuters) -U.S. President-elect Donald Trump has invited Chinese President Xi Jinping and other foreign leaders to his inauguration next month in ...