Live data from Hacker News

Ten seconds of math

mental-math-trainer.com

51–60 of 123 posts

Re: Ten seconds of math

#51
After going for several minutes I gave up.

In addition to a leader board, it needs to: - Have a time limit and see who can get the most calculations done on that fixed time - or, have a fixed number of calculations and see how fast people can answer them - or, it could get faster as you progress

The calculation of the "you are better than X%" needs to be fixed because everybody in my office was better than 100%

Re: Ten seconds of math

#52

I've played with many of these. And this one is pretty good. One thing that I'd like to see is a "verbal" option in these types of apps. I have trouble "hearing" math and keeping it in my head. I envision an app speaking the problem, then you have to type in the answer. It requires both math and keeping the problem in your head. Lastly, a verbal or speaking option maps to many real world scenarios.

http://ccccnews.herokuapp.com/ Use the numpad.

If you don't care about the setting: 1. Click "Play game" 2. Press 2, Enter, Star once it loads.

Make 24. Enter the two intermediate results. Numpad plus repeats the question.

I don't know if this is a good place to start if you have trouble hearing but might be fun for practice anyway.

Re: Ten seconds of math

#53

When I was near the end, I pressed backspace to clear my answer, and it wound up navigating me back to HN, wiping out my results. (I hate backspace-to-go-back. It's the worst feature in a browser. Is there a way to turn it off?) This mental math exercise is a cool and fun concept! Good execution.

http://www.chromeextensions.org/appearance-functioning/backs...

Re: Ten seconds of math

#54
For me there are certain mental calculations that take longer to process than others. 2 + 2 is super easy. 7+8 is not as immediate. I need a program like this that learns which calculation take me longer, even if it's just slightly longer, and then drills and drills my weak points over and over again. That would be a real mental math trainer.

Re: Ten seconds of math

#56
post #24
post #7

I crazy love how it auto submits your answers for you, super convenient! My dad made me do similar online mental math exercises when I was younger and I always hated how clicking "next" reduced my time. Does it take into account what your settings were when it reports your score relative to others?

Doesn't pressing Enter generally work? I'm usually surprised by how many people click a button to submit a form.

This was a long time ago, I'm sure if Enter had worked I would have used it. They could have been using poorly implemented AJAX.

Re: Ten seconds of math

#57
post #37

Noticed some fun SEO hacking at the bottom of the page: puzzles calculate formula mathematics maths decimal number calculating mathematician multiply measurement probability equation division measure homework units word problem solve converting resources tessellation anxiety math problem problems convert unit ratio number trigonometry perimeter divide mental multiplication calculus math quadratic triangle teselation…

They should remove that. It'll get them smacked by the google spam team eventually.

If not already... You really shouldn't do stuff like that. SEO 101.

Re: Ten seconds of math

#58
I thought that maybe the ranking was real.. no its not

  function getRank(score) {
    // TODO we should add a real ranking one day
    var ONE_BARELY_REACHES_THIS_SCORE = 200;
    return Math.floor(100 * Math.min(Math.E * score / (ONE_BARELY_REACHES_THIS_SCORE * Math.PI), 1));
  }

Re: Ten seconds of math

#60
post #37

Noticed some fun SEO hacking at the bottom of the page: puzzles calculate formula mathematics maths decimal number calculating mathematician multiply measurement probability equation division measure homework units word problem solve converting resources tessellation anxiety math problem problems convert unit ratio number trigonometry perimeter divide mental multiplication calculus math quadratic triangle teselation…

They should remove that. It'll get them smacked by the google spam team eventually.

https://github.com/michaeljakob/10-seconds-math you can submit a PR to remove it
Post reply on HN