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What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 4

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Jon Dore: Ability to Hide

My grandfather avoided the Holocaust with his ability to hide, and by not being Jewish, and by living in Canada his entire life -- all about strategy.

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Lawn mower

In 1830, English mechanic Edwin Beard Budding (c.1796 - 1846), inventor of the lawn mover, signed a manufacturing agreement with John Ferrabee, Phoenix Iron Works, Stroud. Budding based his design on the helical cutting blades he had seen on cylinders run over newly woven cloth to cut the pile for a smooth finish. His patent (No. 5,990, 31 Aug 1830) described his mower to replace hand scythes for "cropping or shearing the vegetable surface of lawns, grass plats, and pleasure grounds." It had a cast iron frame with a large roller that turned a series of cogs which rotated the blades. Production was increased in 1832 by license to the agricultural manufacturer Ransomes. Budding also invented the adjustable spanner.«

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