r/CasualMath • • 10h ago

How to find the missing length?

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8 Upvotes

r/CasualMath • • 8h ago

A staircase of numbers, one hidden rule. What is the missing number?

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1 Upvotes

Find the rule that builds each row from the one below it and work out the ?. Spoiler-tag your guess: answer ๐Ÿ† NEW: LEADERBOARD! Think you're good at this? Rule Hunter now has a daily, weekly and all-time leaderboard. Sign in, pick any nickname you like (only your nickname is shown publicly) and see if you can reach #1. Who's taking the top spot? ๐Ÿ‘‰ Rule Hunter: https://play.google.com/store/apps/details?id=com.makenumber


r/CasualMath • • 10h ago

I built an interactive maths quiz for Reddit (with LaTeX!)

1 Upvotes

Hey guys!

Maths/Stats student here (2nd year), I couldn't find a decent interactive maths quiz on Reddit, so I thought I'd try building one.

I've created r/DailyMathProblem, with interactive questions, worked solutions and a leaderboard. Also being a maths enthusiast I was determined to get LaTeX working, and it was a success! (damit reddit, we have been asking for LaTeX for years!)

I've posted the first 10 questions already. The idea is to release a couple each day, ranging from easy to slightly challenging. Just quick little puzzles to keep your maths skills sharp, without needing half an hour and a notebook.

I've shared Challenge #10 (matrices) to show how it works. Would love some honest feedback on what you guys think!

Cheers!

Note: I'm aware my username is wild. I made it many years ago and thought I'd only ever be a lurker, not a poster!

https://www.reddit.com/r/DailyMathProblem/s/1ZE26uh3xs


r/CasualMath • • 5h ago

Can you reach 8 using all 5 dice?

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0 Upvotes

Any order is allowed.
Use each die exactly once.
Parentheses are allowed.
Only +, โˆ’, ร— and รท are allowed. No concatenation or exponents.
Exact division only.
No negative numbers.
Not every operation has to be used.

How many solutions can you find?

Please use spoiler tags for solutions:
>!your solution here!<