Some everyday tricks are so useful and simple they can come in handy to more than one generation. Yet over time, they’re somehow forgotten, and they turn into what’s called “grandma’s tips.”

Some everyday tricks are so useful and well known at one generation, but over time, they’re somehow forgotten and people start calling them traditional or old-school tips.

Below are 7 tricks from childhood learnt from school, but still can be used today.

### #1. The Degrees Of An Angle Using Hand

Spread your fingers as much as possible, and put your palm on a surface over the angle of which you want to measure. The pinky finger should lie on the bottom side and it means 0°. The angle between the thumb and the pinky finger will be 90°, the angles between the pinky finger and the other fingers are, respectively, 30°, 45°, and 60°.

### #2, Length Using Hand

If you need to roughly know the measurement of an object without a ruler, you can use your fingers of one hand. In accordance with the average human proportions, the distance between the tips of the thumb and forefinger is about 18 cm (7″), and the distance between the thumb and the pinky finger is about 20 cm (7.87″).

Of course, this method isn’t absolutely accurate because each person has a different hand size. Yet it can be useful if you need to measure a large object with a small ruler, just measure the distance between your fingers in advance and use your hand to measure the object.

### #3. Doing Multiplication On Fingers

Children can quickly remember doing multiplication of small numbers, but they have difficulties with the numbers 6, 7, 8, and 9. To help your child with this, teach them this simple trick.

Turn your palms to your face. Number each finger, starting with the pinky finger, from 6 to 10. Now, for example, to multiply 7 by 8, connect finger #7 on the left hand with finger #8 on the right. The number of fingers at the bottom, counting along with the connected ones, means tens (we got 5 of them). As for the fingers located at the top, you need to multiply them among themselves, they mean units (in our case, multiply 3 by 2). Answer: 7×8 = 56. In this way, you can quickly multiply by 6, 7, and 8.

To multiply by 9, straighten your fingers, and put your hands on a table with your palms down. Now, to multiply any number by 9, just bend the corresponding finger.** **Fingers “before“ mean tens, ”after“ means units. For example, to multiply 7 by 9, bend the 7th finger. 6 fingers remain “before” and 3 ”after.” We get the answer: 7×9 = 63.

### #4. Checking The Quality Of Battery

It’s very simple to differentiate a good battery from a bad one. Raise two batteries 1-2 cm above a table, and drop them. The battery that bounces and falls is empty.

### #5. Knowing If The Moon Is Waxing Or Waning

To determine the moon phase, use the shape of the alphabet letters D, O, and C. A full moon is in shape of O, the first quarter is in shape of D, and the third is in shape of C.

### #6. Knowing The Number Of Days In A Month

Make a fist, and start counting the months by each knuckle. Each knuckle bump and gap is a separate month. If you count on one hand and you reach the end, start again with the knuckles of the same finger you ended on. If the month is on the knuckle bump it means there are 31 days. If it’s on the gap it means there are 30 or less days.

### #7. Determining The Time Left Before Sunset

Keep your fingers together, and reach out your hand so that the sun right above your index finger. Now count the number of fingers to the horizon line. Each of the fingers represents approximately 15 minutes until sunset.

Do you know any other tricks? Share them in the comments below!

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