Focus with multiplication. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
Free library / Directory / Spectacular tricks and their clues

Focus with multiplication. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

In this focus, we will rely on the fact that digital root the product of the digital roots of two factors is equal to the digital root of the product of these factors. So, you can ask someone to write down a fairly large number, say five or six digits, and sign another large number below it. Watching how the numbers are written, you determine the digital roots of both factors, multiply them and find the digital root of the product.

Now you turn your back and invite the viewer to multiply the numbers they wrote down. Then ask him to circle any number of the result (except zero) and say the rest of the numbers aloud in any order.

Focus secret:

You will find out the marked number by subtracting the digital root of the set of numbers named by the viewer from the digital root that you had to remember. If the second root is greater than the first, again, before subtracting, add nine to the first of them.

Author: M.Gardner

We recommend interesting articles Section Spectacular tricks and their clues:

▪ floating vase

▪ Pulling the rope

▪ Animated picture

See other articles Section Spectacular tricks and their clues.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

The composition of the intestinal microflora 06.05.2016

In 95% of people, 14 main groups of microbes are represented in the intestinal microflora, which make up the "core" of the human microbiome. This conclusion was reached by the authors of two international studies: one led by Professor Jeroen Raes from the University of Leuven (Belgium), and the second led by Dr. Alexandra Zhernakova from the University of Groningen (Netherlands).

The methodology for both studies was the same: volunteers (1106 in Belgium and 1135 in the Netherlands) gave stool samples, blood tests, completed a detailed questionnaire about their health and lifestyle, and also underwent some additional medical tests. Analysis of the collected data allowed scientists to identify 600 groups of microbes that inhabit the bodies of people, of which 14, as mentioned above, turned out to be practically a common "core".

Comparison of the composition of the microflora with the results of other tests also gave interesting results. Previously, it was thought that the composition of the human microflora is influenced mainly by such factors as whether a person was born naturally or by caesarean section, the duration of his breastfeeding and body mass index. However, it has now turned out that these factors together have only 20% of the impact on the diversity of microbes living in our intestines.

The key factors turned out to be quite different. These are the medications we take - including heartburn medications, antibiotics and statins - the efficiency of our breathing, stool consistency and age.

Both research teams set out to find one key factor that would serve as a good indicator of the overall health of our microbiome. The results were different. The first, "Belgian" group found a correlation between this indicator and the rate of passage of feces through the intestines, i.e., stool. The second, "Dutch" team identified another factor: it is the protein chromogranin A, which signals the stressful activation of the nervous and endocrine systems of the body. Its reduced concentration in human blood corresponds to a more diverse microflora, the scientists write.

In any case, these new data force us to reconsider the existing ideas about the composition of the microbiome of our body and what factors influence it. The discoveries made are of great importance for practical medicine.

Other interesting news:

▪ Biostar J3160MD motherboard

▪ The largest and smallest snake

▪ Maya Pepper Cocoa

▪ Recognition of people at a distance by heartbeat

▪ A new class of metamaterials capable of changing their physical properties

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Biographies of great scientists. Article selection

▪ article Don't be surprised. Popular expression

▪ article What Do Black Smokers Smoke? Detailed answer

▪ article Weather Records. Earthquakes and natural disasters. Tourist tips

▪ article car. Security devices and alarms. Directory

▪ article Smithy at home. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews