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Tobacco is harmful to health

Recently a study was published that stated that: "40% of children are subjected to tobacco smoke in their home." If we assume that all households consist of a father and a mother and one or more children, that children do not smoke and that smoking rates are the same for men than for women, what percentage of adults are smokers?
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Rights in dispute

As a riddle maker, I sometimes receive emails asking me why this or that solution is given a prize when, in his opinion, his solution was as good as the one he took. I may speak of a mathematical problem in which the one who took the prize followed the custom of taking the result only to the third decimal place, while the one who writes to me complains that he was breaking the horns until he reached the tenth, giving clearly what he considers a better answer.
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The excitation transfer paradigm and the arousal

Video about the excitement transfer paradigm and the arousal The excitement transfer paradigm or why we become irritable. This theory proposes that the excitement that a given event causes us is transferred to the responses we give to other subsequent events with the same intensity.
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