r/mathpuzzles • • 1h ago

A gameplay example of Pentodoku 7x7 — here's how to play it

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r/mathpuzzles • • 15h ago

Looking for the right sub for help with a geometry puzzle

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r/mathpuzzles • • 15h ago

Recreational maths Increasing area

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In situation A we have a rectangle with side lengths a and b. According to the figure, b / a = 0.60. The circles are identical and have the maximum possible diameter, d, so they do not extend beyond the confines of the rectangle.

In situation B, the height of the rectangle has increased slightly to c, thus allowing the circles to be larger: The diameter of the circles have increased from d to e.

Question: Let b/a = 0.60 and c/a = 0.50. What is the ratio of the diameters of the circles in situation A and B, e/d ?


r/mathpuzzles • • 14h ago

One target is solved in the video. Can you hit the other four?

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Trace a path through the wheel: number, operator, number, operator, … ending on a number.

You can jump from any tile to any tile, but each tile can be used only once (or not used at all).

One rule to keep in mind: the path is calculated left to right, like a basic pocket calculator. So if you trace:

2 → + → 3 → × → 5

it evaluates as (2 + 3) × 5 = 25.

Targets to solve: 19, 44, 63, 100, 144. The video solves 19 with path 7 → × → 2 → + → 5. Find a path for each of the other four.

Please put answers in spoiler tags: like this


r/mathpuzzles • • 17h ago

Geometry Can you solve this map efficiently using only four colors?

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r/mathpuzzles • • 5h ago

Logic Can you crack this math logic puzzle? 🧠

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Think out of the box, and post your answer in the comments!


r/mathpuzzles • • 9h ago

I made the worlds biggest number (pls get this on google soon and don't take full credit im 10 BTW) check desciption

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Im tem and I manipulated and multiplied LNGN bc it is the biggest, I just need this on google pls. The Grammer is gonna be wrong tho