Total Sum

Having fun with Maths

This App is an educational / puzzle app designed to enhance your mental arithmetic skills.

The game consists on selecting 6 numbers and seeing if you can form a sum to reach the generated target.

You may use and of the standard arithmetic operators + , -, x or ÷ as well as using brackets to control the precedence of operators.
 
Here is an example of a puzzle
 

and the completed puzzle.

There are 4 game types

 Large & Small
Random Numbers
Challenge Games
10 Games in 10 Minutes
Plus & Minus

each of which can be played with a time timer set to ON or OFF.

Below is an example of the game in Action
 

Game Screen 

To play the game tap on the numbers and operators to form a complete sum that adds up to the target total.
 
Tapping on a number or operator will insert it at the cursor position.
The current sum it automatically recalculated after each number or operator is placed on the board.
 
The current total is displayed in the status bar, along with the difference between the current total and the Target.

When the game first starts, a spinner appears indicating that the app is calculating whether a solution is possible. Once the checking is complete, the spinner is replaced with a tick if a solution is possible or a cross if a solution is not possible.

A timer is displayed, which displays either

The time left if the game is being timed
The time of the game

When a the current total is the nearest total to the target achieved the current game the new closest total is displayed.

The back arrow deleted the tile to the left of the cursor and recalculated the current total.

The refresh button will restart the game, clearing all the operators from the board and returning any placed numbers to their starting positions.

The Help button, will display some details on the target. (see Research Target below).

Tapping on "New Game" will close the current game and return to the previous screen.

Research Target

This screen shows

The Divisors of the current target.
Buttons that will show number tables for each of the game numbers.
Buttons that will show the Divisor and remainder of the total for each of the game numbers.

Large & Small 
In this game type you select 6 times, selecting either large numbers or small numbers.
 

The large numbers are selected from
25, 50, 75 or 100

The small numbers are selected from
1,2,3,4,5,6,7,8,9
 
Tapping anywhere in the large number section will select one large number.
Similarly tapping anywhere in the small number section will select one small number.
 
Pressing the refresh button will clear the currently selected numbers allowing numbers to be re-selected.
 
Once six numbers have been selected, tapping the start button will start the game.
 
Random Numbers 
In this game type random numbers between 1 & maximum number are selected.
The Maximum numbers may be changed by tapping on the + button or - button.
 

Tapping generate will 6 random numbers.
 
Once selected tapping Start will start the game.
 
Challenge Games
 

There are a number of challenge games that are more difficult than the average randomly generated games.
 
The list is split into 2 sections

Large & Small
Random

Each game may be hidden by tapping on the hide button.
 
Tapping on the "All" button will unhide all the challenge games.
 
10 Games in 10 Minutes
 In this game type you have a ten minute time limit to play 10 games with a single set of numbers.
 First you select a set of numbers, either "Large & Small" or "Random" you are then presented with the Ten in Ten minutes Main screen.

This status screen shows the number of Games played, the time remaining and the number of Games Played and Solved.

Plus & Minus
 
This is a very simplified version of the game. The game consists of selecting 6 numbers and combining them using the plus and minus operators.
 

Note that the total can always be achieved.
 
Statistics
 
This screen shows your current statistics.

The screen is broken down into a number of sections

All Games
Timed Games
 Random Games

Tapping on the Trophy Button will display a list of Trophies that have been awarded.

Tapping on the reset button will display a warning confirming that you want to rest all the statistics to zero.
 TrophiesThis screen shows various the trophies that have awarded.
 

Settings
This screen shows various settings for the game.
 

The Game Time Limit can be set to "ON" or "OFF".
The length of the time limit can be adjusted in intervals of 10 seconds by using the + and - buttons.
 
Tapping on the Reset Statistics, will reset the number of games played / Solved and remove all Trophies awarded.

Restart Saved Game
This will restart the last game played.
 
Demos
 
There are a number of demos of how to play the game.
 