Hi! I'm Bart Bonte, a Belgian independent game designer and bontegames.com is where I blog about new interesting browser and mobile games. My own games are all in the left column (or at the bottom of this page on mobile). More info about me and my games on bartbonte.com.
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April 27, 2013

brain sequence

Can you complete every number sequence in the math game brain sequence by MindGames?

This is very frustrating because it doesn't give you enough time to come up with a solution, adn then it doesn't even tell you what the solution was. Very irritating!

if you need more time on a puzzle, just hit pause and go back to the menu. when you click start, there's an option to continue your previous game. the timer will restart. i agree, these puzzles are hard, there should be a hint button!

I got to level 9 by making a note of the numbers and hitting the pause button... but it really isn't worth the effort when you fail a level and have to go back to the start with no hints or clues!

I googled the sequence of the "increases" from one number to the other and added the following number to 728. The result was right, but I don't understand the sequence itself :(

If you really need the solution it is one unit less than a thousand.

Very nice game most of the time, where I was able to figure out the solution by myself.

Numbers are fascinating and I sort of understand that some people may follow them (or dance with them) all life long. Sequences have an inner beauty - once you've dismantled them ;)

The sequences are simple enough. Arithmetic progressions. Some primes. Some squares. Some have alternation of terms, which is really not possible to identify reliably with only 5 terms, otherwise simple enough.

I could write a program to solve these -- other people already have.

The real problem is that beyond about level 14 or so the numbers get so large it's really about the mental arithmetic, not solving the puzzles. I really couldn't be bothered cheating.

The trouble with these sorts of problems is that there's never a single answer. In fact, with 5 terms, you can always find a fifth degree polynomial so that the next term will be whatever you want. And for that matter, check out http://oeis.org/ as someone mentioned, and note how many sequences start 1,2,3,...,10, but whose next term is _not_ 11

I can't really say this was an original game idea, because it wasn't, and neither was it a fun implementation of the idea. The inclusion of a time limit is rendered entirely useless when a pause function is also included. There literally is nothing good to say about this game other than that it killed 5 minutes of my rainy sunday afternoon. Better than church, though!

Agree with those who say it's frustrating to time out with no explanation of what the solution was, then having to work your way back up to the same level. Repeating the ones you already solved, just with different numbers, seems purely tedious.

If you are you looking for a solution or a walkthrough for one of the game links, please have a look in the comments.
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## 21 comments:

First!

This is very frustrating because it doesn't give you enough time to come up with a solution, adn then it doesn't even tell you what the solution was. Very irritating!

if you need more time on a puzzle, just hit pause and go back to the menu. when you click start, there's an option to continue your previous game. the timer will restart. i agree, these puzzles are hard, there should be a hint button!

I got to level 9 by making a note of the numbers and hitting the pause button... but it really isn't worth the effort when you fail a level and have to go back to the start with no hints or clues!

Got to level 14 . . anyone?

stuck at level 14:

5 215 342 511 728 ?

I googled the sequence of the "increases" from one number to the other and added the following number to 728. The result was right, but I don't understand the sequence itself :(

If you really need the solution it is one unit less than a thousand.

"increments"?

Mmm, just check http://oeisf.org/

http://oeis.org/ to be more precise...

Bart when are you going to make a new game.

Thank you, Olavo!

I used your help to "solve" level 18... maybe one day I'll fry my brain in the attempt to understand the sequence's formula :)

11'825 is my score but part of it goes to Olavo!

Very nice game most of the time, where I was able to figure out the solution by myself.

Numbers are fascinating and I sort of understand that some people may follow them (or dance with them) all life long. Sequences have an inner beauty - once you've dismantled them ;)

Thank you, Bart, for sharing!

Not fun.

The sequences are simple enough. Arithmetic progressions. Some primes. Some squares. Some have alternation of terms, which is really not possible to identify reliably with only 5 terms, otherwise simple enough.

I could write a program to solve these -- other people already have.

The real problem is that beyond about level 14 or so the numbers get so large it's really about the mental arithmetic, not solving the puzzles. I really couldn't be bothered cheating.

The trouble with these sorts of problems is that there's never a single answer. In fact, with 5 terms, you can always find a fifth degree polynomial so that the next term will be whatever you want. And for that matter, check out http://oeis.org/ as someone mentioned, and note how many sequences start 1,2,3,...,10, but whose next term is _not_ 11

I can't really say this was an original game idea, because it wasn't, and neither was it a fun implementation of the idea. The inclusion of a time limit is rendered entirely useless when a pause function is also included. There literally is nothing good to say about this game other than that it killed 5 minutes of my rainy sunday afternoon. Better than church, though!

Agree with those who say it's frustrating to time out with no explanation of what the solution was, then having to work your way back up to the same level. Repeating the ones you already solved, just with different numbers, seems purely tedious.

stuck at level 8...

6 342 511 728 999

oeisf.org couldn't find a match...

But it was the same series as tam's: n³-1, and 1330 solved it!

I immediately recognized the 6 as a red herring, deliberately put there to throw me off the trail and shave precious seconds off my time.

Luckily, having memorized my cube tables as an infant paid off, and the bastards didn't beat me... this time.

The sequence is 999, the formula is the number (10) cubed minus 1

THIS IS SO HARD NOT ENOUGH TIME

hint for level 14:

e.g. 5 215 342 511 728

divide starting with the first number and continue adding one:

215/5= 43

342/6= 57

511/7= 73

728/8= 91

Isn't it more clear?

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