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re: I have an interesting math riddle
Posted on 12/8/18 at 10:41 am to CatsGoneWild
Posted on 12/8/18 at 10:41 am to CatsGoneWild
quote:78 and 40 adds up to 118. When you subtract your age you end up with the last 2 digits of of the 20th century. Basically, this won't work in a month unless you change it to 79 or 41 and it won't work for anyone born in 2000 or later.
Subtract your age from the number 78. Then, add 40
1
Posted on 12/8/18 at 10:45 am to theunknownknight
If Born after today then add 39 instead of 40. There. Fixed it.
Posted on 12/8/18 at 10:47 am to CatsGoneWild
quote:Samuel Clemens has a quote about this: Better to keep your mouth closed and be thought a fool than to open it and remove all doubt.
CatsGoneWild
Posted on 12/8/18 at 11:08 am to CatsGoneWild
I bet next year if I subtract my age from 79 and add 40 it'll be right too!
Posted on 12/8/18 at 11:11 am to CatsGoneWild
quote:
Anyone know how that works?
Posted on 12/8/18 at 11:14 am to Sao
Double the gifts, bruh
Posted on 12/8/18 at 11:21 am to CatsGoneWild
quote:
Subtract your age from the number 78. Then, add 40. It will tell you what year you were born.
This will puzzle people who have trouble with arithmetic but it's easy to explain. You aren't adding 40, you're adding 1940:
78 - x + 1940 = 2018 - x
And 2018 minus your age is of course the year you were born. Duh.
Posted on 12/8/18 at 11:22 am to CatsGoneWild
So you're saying you were born in the first century of Our Lord.
This post was edited on 12/8/18 at 11:22 am
Posted on 12/8/18 at 11:58 am to CatsGoneWild
Try my grandfather's age/year of birth and get back with me:
Currently aged 119 (deceased).
78-119= -41
-41 + 40 = -1
Born 1899. How's that formula working out for you, now?
It's basically just a mathematical construct which assumes no one is over 118 years old (78+40=118), and the entry of the subject's age gives the formula a connection to a specific year.
Currently aged 119 (deceased).
78-119= -41
-41 + 40 = -1
Born 1899. How's that formula working out for you, now?
It's basically just a mathematical construct which assumes no one is over 118 years old (78+40=118), and the entry of the subject's age gives the formula a connection to a specific year.
Posted on 12/8/18 at 12:02 pm to CatsGoneWild
This only works if you have had your already this year.
Posted on 12/8/18 at 12:12 pm to CatsGoneWild
This shite comes up every year on here. Typically around Oct-Nov and then someone like there is on page one announces their birthday is after the current date to bust their math problem.
Posted on 12/8/18 at 12:22 pm to FCP
quote:
Try my grandfather's age/year of birth and get back with me:
Currently aged 119 (deceased).
78-119= -41
-41 + 40 = -1
Born 1899. How's that formula working out for you, now?
Just got with the boys in the lab and upgraded the formula:
(78-(your age) +40) + 1900= birth year.
Crazy I know but trust me this formula is legit.
Disclaimer:
Only valid if you've already had your b-day this year.
If you have had your b-day this year, valid until your b-day next year.
No refunds.
Posted on 12/8/18 at 12:23 pm to CatsGoneWild
78+40=118; therefore, 2018-118=1900.
Add 40 to 1900 = 1970; therefore, you are 78 years old if you were born in 1940.
Add 40 to 1900 = 1970; therefore, you are 78 years old if you were born in 1940.
Posted on 12/8/18 at 1:10 pm to ell_13
quote:
78 and 40 adds up to 118. When you subtract your age you end up with the last 2 digits of of the 20th century. Basically, this won't work in a month unless you change it to 79 or 41 and it won't work for anyone born in 2000 or later.
Some one downvoted the (your) answer?
A couple others later laid out the algebra for it.
Who said you'd never use algebra again?
Hell, knowing something from 9th grade makes you look mystical to 85+% of the population.
no worries though, your phone can do everything for you, right?
Posted on 12/8/18 at 2:25 pm to CatsGoneWild
quote:
It will tell you what year you were born.
But I already know what year I was born...
Posted on 12/8/18 at 2:31 pm to LordSaintly
quote:
Double the gifts, bruh
My birthday is so close to Christmas that I've never had a birthday party.
PROTIP: Don't frick in March. Your children will hate you.
Posted on 12/8/18 at 3:06 pm to CatsGoneWild
quote:
Anyone know how that works?
Something something commutative property of addition.
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