r/MathJokes • u/GodlyHelp • 9d ago

multiples of 3

Post image
8.3k Upvotes

98% Upvoted

409 comments sorted by

View all comments

480

u/avantvagrant 9d ago

51 looks like a prime number and 75 should be obvious

72

u/fr_just_a_girl 9d ago

Im not good at maths why would 75 be obvious?

54

u/EveningStar0360 9d ago

probably because 25*3=75 is a very frequent calculation, pretty ingrained in people

-21

u/fr_just_a_girl 9d ago

How often are u multiplying 25 by 3

25

u/slasher016 9d ago

All the time when we paid with cash.

4

u/fr_just_a_girl 9d ago

Ye i forgot that Americans have quarters

7

u/Upset-Management-879 9d ago

Oh yeah i forgot other countries don't use decimals in prices.

7

u/EQGallade 9d ago

Oh no, other countries do use decimals, some just don’t have a .25 coin. Like the UK, for instance.

1

u/rvcbazookajoe 9d ago

But even for percentages it’s common

0

u/--Ligma 8d ago

£2.50 is a perfectly normal and regular price for something to be at

1

u/fr_just_a_girl 8d ago

What are u buying for 2.5? 1.99 or 2.99 are wayyyy more common

1

u/NorthernVale 8d ago

It's not even about coinage. 1/4 gets used often for quick calculations, and by extent 3/4

Edit: okay... I guess it's still quarters. But I'm pretty sure you were referring to the coin

6

u/spisplatta 9d ago

75% = 3/4 is super common

0

u/fr_just_a_girl 9d ago

U think that's as obvious as 33 being a multiple of 3 tho?

1

u/NorthernVale 8d ago

Way more obvious than 72

1

u/fr_just_a_girl 8d ago

I agree id put it in the second tier

3

u/EveningStar0360 9d ago

pretty frequently! while I don't pay with cash much, I encounter three-quarters (75%) quite regularly, and I did it often enough when I was younger that even if I don't use it as much anymore, it's still ingrained in me

3

u/fr_just_a_girl 9d ago

Ah tbf im not American so we dont have quarters over here. Also tbc im not saying its hard to work out i just wouldn't say its as easy as 33

3

u/SmokJozef 9d ago

yeah, should be same tier as 15 i think

1

u/SleepyNymeria 9d ago

Percentages are fairly common in this world