The Magical Math Of 79 Beers: Age Subtraction Mystery

A viral social media post has been doing the rounds at the end of each year, surprising people with the last two digits of their birth year. The formula is 79 beers minus your age plus 40 dollars. It works for most people born after 1900, but not for those born after 1999. The math works because 79+40=119, which was the number of years from 1900 to 2019. Subtracting your age from 119 and then adding 40 will give you the last two digits of your birth year.

The formula: 79 beers - your age + 40 dollars = the year you were born

The formula "79 beers - your age + 40 dollars = the year you were born" is a simple mathematical trick that gained popularity through a viral social media post. While it might seem like magic, it is just basic arithmetic. The trick works because of the variable of age. No matter what number you put in for age, as long as you were not born in the 1900s, the math will always give you the last two digits of the year you were born.

However, it is important to note that this trick only works well at the end of the year, specifically on December 31st. This is because, by this time, most people would have had their birthday in the current year. Additionally, it only works for people born in the 1900s. For those born after 2000, the formula needs to be adjusted. For example, at the end of 2020, you would use 80 beers instead of 79, so for someone who was 49 years old on December 31, 2020, it would be 80 - 49 = 31, and adding 40 gives you 71, which is the last two digits of the birth year.

As the years go by, this trick will work for fewer people as those born in the early 2000s will not get the correct result. It is a fun trick to play on friends, but it is not as miraculous as it seems, as any formula that involves your age and the year of your birth will likely have a simple mathematical explanation.

It's simple math

The "79 beers minus your age" trick is a simple mathematical formula that can be used to determine the last two digits of the year a person was born. This trick went viral on social media at the end of 2019, surprising people with its accuracy.

Here's how it works:

The formula is 79 beers (or any number of beers) minus your age, plus 40 dollars (or any number of dollars). For example, if you were born in 1971, the calculation would be as follows:

79 beers - 48 years (age) + 40 dollars = 31.

Now, add 1900 to that number, and you get 1931, which is not correct. However, if you were born in 1971, adding 2000 to 31 gives you 2031, which is correct!

The trick works because the number of years between 1900 and 2019 is 119 (79+40). Subtracting your age from 119 and then adding either 1900 or 2000, depending on whether your birthday has passed in the current year, will give you the year of your birth.

It's important to note that this trick only works for people born in the 1900s. Additionally, it works best at the end of the year when most people will have had their birthday in the current year. For those born in the early months of the year, the formula may need to be adjusted by adding one to the number of beers to account for the new year.

While the units of beers, years, and dollars don't typically go together, this trick plays with numbers and variables to reveal an interesting mathematical relationship. It's a fun way to stump your friends and showcase the power of simple math!

It only works for people born before 1999

The viral trend "79 beers minus your age plus 40 dollars" is a simple mathematical trick to find out the year someone was born. However, it only works for people born before 1999. Here's why:

The equation relies on the variable of age. No matter what number you input, as long as you weren't born in the 1900s, the math will always give you the last two digits of the year you were born. This is because 79+40=119, which was the number of years from 1900 to 2019. So, subtracting your age from 119 will indeed give you the year you were born, but only if you were born before 1999.

For example, if you were born in 1971, by the end of 2019, you would have been 48 years old. 79-48=31. Adding 40 to this gives you 71, which is indeed the last two digits of 1971.

The trick will still work for people born in the early 1900s, but only on December 31, 2019. After that date, the number of beers needs to be adjusted to 80 to account for the passing years. So, for the same person born in 1971, on December 31, 2020, the calculation would be: 80-49=31. Adding 40 gives you 71, which is still correct.

As the years go by, this trick will work for fewer and fewer people as it only applies to those born before 1999. For those born after 1999, a large negative number is obtained, and the trick falls apart.

It's worth noting that this trick also doesn't work for people with birthdays early in the year, as it assumes that everyone has already had their birthday in the current year. So, it only works for people born before 1999 and those with birthdays after January 9th.

It only works if you've had your birthday this year

The viral social media post that claims to tell the year you were born through simple math works like this: 79 beers minus your age plus 40 dollars. However, this formula only works if you've had your birthday this year.

The math works because of the variable of age. No matter what number you put in there, as long as you weren't born in the 1900s, the math will always give you the last two digits of the year you were born. This is because 79+40=119, which is the number of years from 1900 to 2019. Subtracting your age from 119 will, therefore, give the last two digits of the year you were born.

For example, if you were 48 years old at the end of 2019, you would calculate 79-48=31. Adding 40 to this result gives you 71, which are the last two digits of 1971. This is because the formula only works at the end of the year, as most people will have had their birthday in the current year by then.

The formula can be adjusted for other years by changing the number of beers to match the number of years since 1900. For example, at the end of 2020, you would use 80 beers, and at the end of 2021, you would use 81 beers. This trick will only work for those born in the 1900s, and even then, only if their birthday has passed in the current year.

It's not magic

The '79 beers minus your age' trick is a simple mathematical formula that can reveal the last two digits of the year a person was born. However, it is important to note that this trick only works for people born between 1900 and 1999. For those born outside this range, the formula will not yield the correct result.

The trick involves subtracting your age from 79 and then adding 40. For example, if you are 30 years old, you would calculate: 79 - 30 + 40. This gives you a result of 89. This number represents the last two digits of the year an individual was born. In this case, 89 corresponds to 1989.

The reason this trick works is that the numbers 79 and 40 are specifically chosen to relate to the current year. For example, in 2019, 79+40 equals 119, which is the number of years from 1900 to 2019. Therefore, subtracting your age from 79 and then adding 40 will give you the last two digits of the year you were born, as long as you were born before 2000.

It is worth noting that this trick only works well at the end of the year, as by this time, most people will have had their birthday in the current year. For example, if your birthday falls in January 2024, the formula would not give the correct result for your birth year if calculated in December 2023. Additionally, the number of beers in the formula needs to be adjusted each year to account for the passing of time. For example, at the end of 2020, the formula would use 80 beers instead of 79.

While the '79 beers minus your age' trick may seem like a magical puzzle, it is simply a fun mathematical quirk that can be used to impress your friends and family.

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