Counter: 98470,today: 41,yesterday: 0
Last-modified: 2015-01-09 (金) 18:44:24 (1281d)
Link: SageMathCloud(926d) Symmetrica(1000d) Jupyter(1020d) Mathics(1020d) HoTT(1051d) tsakai(1281d) SandBox(1281d)
Cache update: 25 minutes
Problem 631 will be accessible in 1 day, 8 hours, 23 minutes (Sunday, 15th July 2018, 10:00 am)
■−2018/07/14 05:38:51 King’s College London - Seven Day Maths
Challenge 178: Join the Dots...
If I have four dots, arranged in two rows of two to make a square, and I draw a triangle by joining three of the dots, there are four triangles I can draw, but they are