# 10 tricks we were taught in school

Zhitey councils, which were taught while still in school, will be useful for more than one generation. In the modern world, some things have become easier. The necessary information can be found on the Internet, but it is not always possible. Simple tricks will help you better navigate time and space.

## Determine the number of days per month by hand

To find out how many days in any month of interest, it is not necessary to have a calendar at hand. Just bend your palm into your fists and count your finger knuckles. The beginning of the countdown can be from both the pinky finger and the index finger. When one hand is missing, one must bend the second palm into the fist, then continue counting down. If the month falls on a bone, it means 31 days in it, 30 days in the depression. The exception is Feb. It falls on a depression, but it has 28 or 29 days in it.

## Determine the phase of the moon on the sky

The growing and decreasing Moon on the sky appears in the shape of a crescent moon After remembering school lessons, it is easy to determine which phase the heavenly light is in. To do this, you only need to attach your index finger vertically to the edges of the crescent moon. One can just imagine the axis passing through these points. If the letter â€śRâ€ť is drawn, the Moon is growing, the letter â€śCâ€ť – the Moon is aging or waning. On the lunar calendar many plant plants, make billets. Using a simple rule, one can not look into the astrological calendar.

## Write Roman numerals

In some areas of life you need not only Arabic, but also Roman numerals. Not everyone remembers large numbers by heart. In abundance, they are often found only up to dozens. To remember Roman numerals and numbers you can use the phrase: â€śWe Darim Juicy Limons, Enough Vsem Ixâ€ť. The first letters in words mean Roman numerals descending: M (1000), D (500), C (100), L (50), X (10), V (5), I (1).

## Determine the weight in grams

When there is no possibility to use the kitchen scales, you can remember some tricks that were talked about back in school. You can measure the desired amount of product using a tablespoon. For example, salt in it fits 25 g, and sugar – 20 g. But to make more accurate measurements, it is still necessary to use scales, as there is a possible error in the spoon method.

## Measure the angles by the

Protrator can determine the size of the angles as accurately as possible There are other adaptations for measuring. If there is none nearby, you can use your hands. To do this, you need to place your fingers as much as possible and apply to the surface on which you need to measure the angle. The little finger should lie on the lower plane. It is conventionally denoted 0Â°. The angle between the thumb and the pinkie will be 90Â°, and the angles between the pinkie and the other fingers are 30Â°, 45Â° and 60Â°, respectively.

## Entertaining multiplication

Children teach the multiplication table back in primary school. But if something is forgotten, you can always take advantage of little tricks. To multiply by 9, you need to straighten your fingers and put your hands in front of you. To multiply any number by 9, just stick your finger at the number of that number is enough. All that will end up before him is a dozen answer, and after a unit. For example, to multiply 7 by 9, you need to fasten the seventh finger. Remains 6 fingers before it and 3 after. The answer is excommunicated: 7*9=63.

You

## can measure

the length of any line with the help of a ruler. But in the household, it’s not always around. In this case you can use your hands. You need to open up your thumb and index fingers as much as possible. The distance between them in an adult is approximately 18 cm. And the distance between the thumb and the pinkie is about 20 cm. This method of measurement is not accurate, because the size of the hands and the length of the fingers differs in different people, but when you need to determine the length of a large object, and the error is permissible, they can be to use. It is possible to measure these quantities in advance to always have a similar â€śrulerâ€ť at hand. Metrage can be roughly determined by the number of steps. The pitch length of an adult of average height is about 1 m.

## Determine battery quality

Sometimes after the battery installation, the device still does not work. With the help of a special tester, the quality of batteries can be determined But not everyone has it. Simple admission will replace accurate testing. You only need to turn the battery vertically, raise 1 cm from the surface of the table and release. It will fall if discharged. A quality battery will land on the table vertically.

## Determine the sides of the light

Compass is designed to accurately determine the sides But it’s not always on hand. In this case, you can navigate the sun. It is necessary to stand up so that the right hand shows the point where the sun emerges (east) and the left at sunset (west). In this case, the north will be ahead, and the south behind. The method cannot be called accurate, as at different seasons the sun can shift to the northeast or south east. You can also navigate the moss location. Usually moss grow on the north side. It is worth looking at the bark of trees as well. On the north side it is coarser, darker. It’s clearly visible on the birch.

## Do not get entangled in the colors of the rainbow

Many people remember which colors the rainbow consists of, but are confused in their sequence. To avoid straining memory, it is enough to remember how schoolteachers were taught to remember it. The phrase â€śEvery hunter wishes to know where the pheasant sitsâ€ť helps greatly in this matter. The first letters of the words match the first letters of the rainbow colors. Accordingly, these colors are: red, orange, yellow, green, blue, blue, purple.