Daily Maths Challenges

189 readers

1 users here now

Share your cool maths problems.

Complete a challenge:

Post your solution in comments, if it is exactly the same as OP's solution, let us know.
Have fun.

Post a challenge:

Doesn't have to be original, as long as it is not a duplicate.
Challenges not riddles, if the post is longer than 3 paragraphs, reconsider yourself.
Optionally include solution in comments, let it be clear this is not a homework help forums.
Tag [unsolved] if you don't have a solution yet.
Please include images, if your question includes complex symbols, attach a render of the maths.

Feel free to contribute to a series by DMing the OP, or start your own challenge series.

founded 6 months ago

MODERATORS

siriusmart@lemmy.world

[2024/06/30] Decimal expansion for real numbers (lemmy.world)

submitted 4 months ago by siriusmart@lemmy.world to c/dailymaths@lemmy.world

4 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] been_jamming@lemm.ee 2 points 4 months ago (1 children)

I think this question is very poorly worded

[–] ArmokGoB@lemmy.dbzer0.com 1 points 4 months ago (1 children)

I read the digits as being part of a product operator

[–] been_jamming@lemm.ee 1 points 4 months ago

Sure, but what is d_\infty? What is the set \infty? What does the question mean by "every real number can be represented by"? There's nothing distinguishing d_1d_2... with d_1 times d_2 since we normally denote the product by writing the variables next to each other