In our school days, we have tried so many tricks, some are useful and simple and some just forgotten, and they turn into what’s called “grandma’s tips.

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We want to recall the past and collected for you five tricks from childhood.

1 Determine the time left before sunset.

Keep your fingers together, the sun should “lies” on your index finger. Count the number of fingers to the horizon line. Each of the fingers represents approximately 15 minutes until sunset.

2 Count the number of days in a month.

Prepare a fist, and start counting the months by knuckles. Each knuckle bump and gap is a separate month. If you count on one hand, then, after reaching the end, count again with the knuckles of the index finger.

If the month is on the knuckle bump, there are 31 days. If it’s on the gap — 30 or less.

3 Know if the moon is waxing or waning.

If you want to teach your child about how to determine the moon phase, use the shape of the letters D, O, and C. The full moon is O, the first quarter is D, and the third is C.

4 Check battery quality.

It’s easy to understand the difference between a good battery and a bad one. Raise two batteries 1-2 cm above a table, and let them fall. The battery that bounces and falls is empty.

5 Length

If you need to measure an object without a ruler, you can use the fingers of one hand. By 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 little finger is about 20 cm (7.87″).

It can be slightly different because each of us 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.