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No1

No1 is a simple arithmetic exercises of the mind. Make the result of expressions to "1", by changing the operators "+, -, ×, ÷". Those operators can be changed by tapping.
Category Price Seller Device
Games Free Nobuatsu Sekine iPhone, iPad, iPod

For example
 2+7+9+4=1
should be changed to
 2×7-9-4=1
One game can be done in 1, 2 minutes so it can be a good small pastime.

"No.1 Advance" is advanced version of

"Time Trial" mode is competed the number of correct answers in specific time. "Score Trial" mode is competed the time to solve the specific number of expressions. The "Short" mode is 60 seconds or 10 questions, "Medium" is 180 seconds or 25 questions and "Long" is 300 seconds or 50 questions. "Free" mode doesn't have any limits, just continue solving as long as you want.

There is an advanced version of No.1, called "No.1 Advance". The new features are...
1. Renewed screen design.

2. Added selecting question level function from Kids, Easy, Normal and hard. (No.1 only has Normal level.)

3. Displaying hint function by tapping "=" once.

4. The question can be passed by tapping "=" again, then No.1 Advance stops screen to check the correct answer. (No.1 just stops for a few seconds and automatically moves to next question.)

5. Added function to pause the game by tapping lower part of screen. (Around Time and Score label.)

6. The last solved question is displayed while pausing. When a question has been solved accidentally, the user can check the correct answer by pausing the game.

If you like No.1 (free version), please try advanced version.

Reviews

Fun, challenging, and more
singletontv

Fantastic and a productive use of idle time. I find this app very challenging, and hard to put down. I visited the developers website and found an identical Mac application downloadable for free as well. Thank you so very much. The only issue I have is I wish that there was an option (or default) that would not immediately clear out a puzzle equation after a few seconds of viewing. The viewer should be able to tell the app when to clear a solved puzzle in "Free mode". Some of us need additional time to review, even if we solved the problem. Sometimes your frustrated and forced to guess. Sometime you prefer to try and tackle the next problem and hopefully come back to the problem that you couldn't solve later. It would be great to see this app expanded with features such as these. Even still it's a very powerful app for those of us who like loosing our hair over math problems. Please expand the apps feature set if you can. Thanks for making this a free app. I've been searching the app store for a number of like minded applications that provide problems and ask the user to solve them in a like manner. I think this app should be the template for others. No fluff, animations, or other things you don't need. Just problems to solve. I hope that you further this idea and introduce a series of similar apps. Thank you


Cinco Estrellas!!
Loves free stuff

I've been searching for a game like this! I am so intrigued by this type of game! Estoy muy feliz que finalmente lo encontre! The interface is a bit boring pero no me importa! I must add that I LOVE the icon;)


Very nice !
Ardorleo

I like it very much !