Day of the week in the palm of your hand. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Day of the week in the palm of your hand. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

We number each day of the week (Monday - 1, Tuesday - 2, etc.). Any student can guess one of the days (a number from 1 to 7), the teacher suggests multiplying the guessed number by 2, then adding 5, multiplying the amount by 5, at the end add zero. The result is reported to the class, from which 250 is subtracted. As a result, the number of hundreds will correspond to the hidden day.

Focus secret:

Substitute instead of the number of the day "x":

((2х+5)*5)*10= (10х+25)*10=100х+250
100x+250 - 250=100x.

Therefore, the number of hundreds always corresponds to the number of the day.

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Random news from the Archive

Routers Tenda W308R, W309R, W322U 08.05.2013

The Chinese company Tenda, which has a wide range of network devices, has expanded the class of budget routers with an N-class Wi-Fi adapter with two models W308R and W309R, and also introduced a compact USB keychain W322U, endowed with the same wireless module.

The W308R and W309R routers are housed in the same 172 x 110,2 x 31 mm cases and have similar features, but the older model has some improvements. For example, the W309R has two detachable antennas with a gain of 7 dBi, while the simpler version has 5 dBi fixed antennas. External features include the possibility of wall mounting and side placement of ventilation holes. On the rear panel there are 4 LAN ports operating at speeds up to 100 Mbps, and one WAN with the same performance indicators, as well as a WPS button that combines the functions of resetting and establishing WPS communication. In front are indicators of the operation of the router.

The devices are based on a rather productive BroadCom BCM 5357 processor with a frequency of 500 MHz, 32 MB of RAM and 4 MB of permanent firmware storage. The Wi-Fi 802.1 b/g/n communication module is used, providing wireless data transmission at speeds up to 300 Mbps thanks to a two-channel connection using MIMO technology. WPA-PSK and WPA2-PSK encryption standards are available. Routers support all modern types of Internet connection: PPPoE, static and dynamic IP, PPTP and L2TP. They have built-in DHCP for automatic assignment of IP addresses within the network. Equipped with QoS technology, which allows you to set priorities in the use of the Internet channel for individual programs or connected devices. Devices allow you to work with IPTV.

Routers are managed through a web interface. It supports configuring security filters for ports, MAC or URL addresses. You can change the MTU, MAC-ID of the WAN port and DNS server addresses, as well as manually configure routing. There is a traffic counter, in the same section of the interface, restrictions are set on the speed of the Internet channel or the number of downloads for one user or group. USB-adapter Tenda W322U Wi-Fi 802.11 b/g/n has modest dimensions - 75 x 23,5 x 11,4 mm and allows you to quickly equip your computer with high-speed wireless communication with a declared bandwidth of up to 300 Mbps, using two built-in antennas. WPS technology allows you to establish a secure Wi-Fi connection just as quickly. Supports WEP, WPA and WPA2 security standards and the ability to create an access point.

Testing of the W308R and W309R routers shows that the performance of the platform is sufficient to perform the most complex tasks: when processing thousands of torrent requests, there is no heating, drop in speed, or slowdown in the performance of the web interface. Data transfer over LAN corresponds to the declared characteristics, but the performance of the Wi-Fi adapter turned out to be only at the level of 25 Mbps at a distance of 2 meters and about 10 Mbps at a distance of 10 meters, and the W309R, as expected, showed itself somewhat better . Perhaps some improvements will be made in this area after the release of the updated firmware. The W322U adapter provides a stable connection, and its speed performance is approximately at the level of the described routers.

Tenda W322U is already on sale in Russia at a price of 500 rubles, and W308R and W309R will be available in the near future - the expected cost will be approximately 800 and 1000 rubles, respectively.

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