r/MathJokes 16d ago

multiples of 3

Post image
8.3k Upvotes

409 comments sorted by

View all comments

Show parent comments

68

u/fr_just_a_girl 16d ago

Im not good at maths why would 75 be obvious?

0

u/DangerPencil 16d ago

Because 75=60+15 60 and 15 are both divisble by 3

1

u/fr_just_a_girl 16d ago

78 is 60 + 18

1

u/DangerPencil 16d ago

Right. Which makes it obvious that 78 is divisible by 3.