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Probability calculation: Head or coin
Throw a coin twice. Is it more likely to have a head twice, or a head once and a coin once? This TedEd video shows the mathematical formulas that answer the question.
The video is in English and (for the time being) not subtitled in Dutch.
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Dissolve in prime factors: Instruction video part 2
This is a video clip explaining the method of decomposing a number in prime factors. (part 2)
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Dissolve in prime factors: Instruction video
This is a video fragment explaining the method to decompose numbers into prime factors.
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Astronomy: Venus in Taurus back
Tuesday, April 3, 2012 Venus will be in the cluster, the Pleiades. The open cluster, in the back of the bull, it will add an extra star. As from the end of March you can see in the evening after sunset in the western sky, Venus closer and closer …
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