Durtles

Problem of the Week #24: Monday June 19th, 2023
As before, these problems are the results of me following my curiosity, and I make no promises regarding the topics, difficulty, solvability of these […]

Problem of the Week #23: Monday June 12th, 2023
As before, these problems are the results of me following my curiosity, and I make no promises regarding the topics, difficulty, solvability of these […]

Problem of the Week #22: Monday June 5th, 2023
Today’s topic suggestion comes from Fraser Ridge. Please let me know if you have topic suggestions as well.
As before, these problems are the results of me […]

Problem of the Week #21: Monday May 29th, 2023
This is the last problem on the May Number Theory topic.
As before, these problems are the results of me following my curiosity, and I make no promises regarding the […]

Problem of the Week #20: Monday May 22nd, 2023
As before, these problems are the results of me following my curiosity, and I make no promises regarding the topics, difficulty, solvability of these […]

Problem of the Week #19: Monday May 15th, 2023
This is a problem I’ve posted before, and I’ve worded it to be a bit less technical. I figured it fits well with this month’s theme.
As before, these problems are […]

Problem of the Week #18: Monday May 8th, 2023
Sorry for the last update today. I was sick over the weekend and slept most of today away.
As before, these problems are the results of me following my curiosity, […]

Problem of the Week #17: Monday May 1st, 2023
The start of May caught me by surprise, so the decision to make this month’s topic Number Theory was a bit last minute. Please hit me with ideas if you have […]

Problem of the Week #16: Monday April 24rd, 2023
As before, these problems are the results of me following my curiosity, and I make no promises regarding the topics, difficulty, solvability of these […]

Problem of the Week #14: Monday April 10th, 2023
As before, these problems are the results of me following my curiosity, and I make no promises regarding the topics, difficulty, solvability of these […]

本周写作提示：乌龟壳都能干什么，你知道吗？写写看吧！
这是我们为海外学中文的孩子们撰写的免费阅读材料，欢迎有意者注册加入创作或留言鼓励！

这天小迪又从小丹的书桌上拿了一张纸，一边在打开的书里翻找着，一边提起粗重的铅笔写字。

亲爱的菲迪斯伯爵，

上次我没找到把信寄出去的方法，所以并没有对你的回信有太多期待。不过我会继续把我看到的关于人类世界的事记录下来，因为总有一天我会找到回去的方法，把这些分享给你的。 […]

Problem of the Week #13: Monday April 3rd, 2023
The tentative plan is to make this month’s problems all about miscellaneous puzzles and games. I have some in mind, but if you have one you’d like to volunteer, […]

这个非虚构类系列的内容会对应《小丹故事集》里的故事介绍科学常识。今天是一开始讲的《龟兔赛跑》故事里的兔子。
本周写作提示：你有特别喜欢的动物吗？介绍一下关于这种动物的知识吧，不知道的话可以先在网上查资料。
这是我们为海外学中文的孩子撰写的免费阅读材料，欢迎有意者注册加入创作或留言鼓励！

亲爱的菲迪斯伯爵，

小迪用两只棍子手转着笔杆，看了一眼旁边打开的百科全书第三册，继续在小丹借给他的白纸上写着。

上次能收 […]

Problem of the Week #12: Monday Mar. 27th, 2023
I figured I should try to stick to a topic each month, so this will be the last one on playing cards until I run out of topics and circle back.
As before, these […]

新系列来啦！其实这个系列是预谋已久的，总觉得有小丹这个虚构类的系列，也要有个非虚构类的相配。现在终于把小丹写到可以切入这个系列的情节了，好开心！
第一章还都是铺垫，非虚构类的内容从第二章开始。
本周写作提示：你对书的种类了解多少？写一篇介绍一下吧！
这是我们为海外学中文的孩子们撰写的免费阅读材料，欢迎有意者注册加入创作或留言鼓励！

这是一个懒散的周六下午。小迪呆坐在小丹房间的窗台上晒着太阳，而小丹则像过去的每个周六的 […]

Problem of the Week #11: Monday Mar. 20th, 2023
I swear it’s pure coincidence that the game we’re talking about right after St. Patrick’s Day is called the “Irish” Snap. I didn’t even know its correct name […]