PostsCommentsPayoutsruoxi.wang (25)in #mathematics • 6 years agoRE: Brainsteem Mathematics Challenges: Factorial SumHi, @rycharde, thank you for the problem and response. I should have triple checked before answering, especially when…ruoxi.wang (25)in #mathematics • 6 years agoRE: Brainsteem Mathematics Challenges: Factorial SumInteresting problem, here is my solution: Firstly, 2^n is an even number, therefore a!, b! and c! must be either: 3…ruoxi.wang (25)in #busy • 6 years agoRE: Another Brain TeaserLol, nice teaser, totally missed that part. Thanks for the problem and pointing out my mistake straight away.ruoxi.wang (25)in #busy • 6 years agoRE: Another Brain Teaser10, it is basically half of the second equation.ruoxi.wang (25)in #maths • 6 years agoRE: Mathematics13394567ruoxi.wang (25)in #puzzle • 6 years agoRE: Puzzle -How many Squares?Lol, the 50th and 51th are indeed well hidden. Thanks for the puzzle and the answer. I really enjoyed it ^.^ruoxi.wang (25)in #puzzle • 6 years agoRE: Puzzle -How many Squares?I could only find 49 too... any hint on finding the other two?ruoxi.wang (25)in #riddle • 6 years agoRE: Everyone is getting this riddle wrong. Can you work it out?Nice problem, it reminded me again to double check everything before jumping to the conclusion ^_^ruoxi.wang (25)in #teaser • 6 years agoRE: Quick Teaser!Seems like 40 to me?ruoxi.wang (25)in #steemstem • 6 years agoRE: What you need to know to study Linear Algebra - #1 Vectors (with animations and pictures)Nice introductory article except that 4,99 is a bit weird to represent a decimal :P