Mystery cards. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Mystery cards. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Prepare seven such cards as shown in the figure. Write numbers on them and make cutouts exactly according to the indicated patterns. One card is left blank; it also has cutouts.

Focus Mystery Cards

Give six cards with numbers to one of the spectators and ask them to guess any of the numbers written on them. Let him then return to you only those cards on which there is a hidden number. Having received the cards, collect them in a neat pile, cover the top with a clean card and immediately say what number the spectator has in mind.

Focus Mystery Cards

Focus secret:

The secret of the trick is based on a special selection of numbers appearing on the cards. To guess the intended number, you need to add in your mind the numbers that are visible in the windows. What happens will be the intended number.

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Random news from the Archive

The dream of our ancestors 23.10.2015

You can often hear that modern city life disrupts the natural biological rhythms of our body - primarily due to the fact that electric lighting allows us to ignore the coming night and continue to be awake, although according to all the physiological instructions inherited from our ancestors, we should already be sleeping. The appearance of smartphones, laptops and other gadgets only exacerbated the problem. We go to bed late, sleep poorly, and get up early. Due to chronic lack of sleep, various diseases arise, not only psycho-neurological, but also, for example, metabolic disorders.

It implicitly follows from this that in the past, in the pre-industrial era, people slept longer. This, however, is doubted by anthropologists from the University of California at Los Angeles. How can one today learn about the way of life of former people, especially if we are talking about prehistoric eras, from which there is no written evidence? You can turn to archeology and paleobiology, or you can go to Africa to the current tribes who continue to live by hunting and gathering - indeed, because their rhythm of life should have remained the same as that of our ancestors.

Jerome M. Siegel, along with colleagues, went to the "wild ethnic groups" of Africa and South America, taking with them gadgets that allow you to evaluate how much a person spent in a dream, how much he walked until he slept, how long daylight hours lasted. These devices had to be worn around the clock on a belt for 28 days. The observation experiment was carried out with the Chimane Indians in Bolivia, the Hadza people in Tanzania, and the Bushmen in Namibia.

Bushmen, Hadza and Chimans spent from 6,9 to 8,5 night hours in bed, and actually 5,7-7,2 hours were spent on sleep, in winter most of the volunteers slept an hour longer. They went to bed not at sunset, but 2,5-4,4 hours after, that is, when the air temperature dropped significantly, but they got up right before dawn, when the temperature dropped to the daily minimum. Only the Bushmen slept for another hour after sunrise. None of the natives woke up at night (although it is believed that "natural people" sleep in two-part sleep, waking up at night for a while). None of them suffered from insomnia, for which there was not even a word in their languages. And, importantly, none of them complained about the lack of sleep, sleepiness during the day, the desire to take a nap.

It turns out that pre-industrial hunter-gatherers sleep as much as modern civilized people: a large-scale study conducted in 2002 by the American Cancer Society showed that most of us sleep an average of 6,5-7,5 hours. It is possible that our difference from pre-industrial people is not how much we sleep, but how we sleep. And it may be not only whether we wake up at night or not, but in some deeper interaction between the body and the environment during sleep. The researchers believe that temperature may be an important factor, and it is possible that for good sleep we need to cool the air in the room, simulating the coolness of the night.

It is also worth clarifying that when they talk about the general medical consequences of improper sleep, they often mean not only and not so much its quantity, but the circadian rhythm itself. You can spend the required number of hours on sleep, however, if you go to bed either during the day or at night, or in the early morning or early evening, the biological clock will become unusable, which will have a bad effect on your health.

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