"Unknown Square" is one of a series of challenges included in the award winning "Math Doodles" iPad app. This version of "Unknown Square" has been designed specifically for the iPhone/iPodTouch screens.

It wasn't until after my school years, that I became a lover of math. I managed to slip through all of those classes, text books, and homework assignments, without learning one of the most important math lessons of all. Math IS FUN!
I design Math Doodles to provide a place where anyone can discover the joy, wonder, and fun of mathematics.
Math Doodle challenges provide plenty of mathematical practice, within a recreational math setting. The mathematical puzzles allow users to play, explore, and experiment with mathematical concepts, while developing and strengthening their strategy and problem solving skills. Math Doodles challenges are designed to allow for multiple solutions and strategies. There isn't only one correct answer.

Unknown Square
Users begin to explore algebraic thinking by developing strategies to solve for unknowns found in a 3x3 array of values. Horizontal, vertical, and diagonal sums for the values are shown.


CHALLENGE MODES:

1. Solve Mode: Strategically solve the puzzle in the fewest number of moves.

2. Infinity Mode: Play as long as you wish.

3. Race Mode: Rack up as many points as you can solving puzzles, before time runs out. The timer is represented by a tab of paper that works its way around the edge of the screen.

DIFFICULTY MODES
Each challenge has an easy mode and a hard mode:

VALUE REPRESENTATION OPTIONS
- Dice
- Fingers
- Hole Tiles
- Ten Frames
- Tally Marks
- Spanish Tally Marks
- Numerals
- Roman Numerals
- Chinese Numbers
- Arabic Numbers
- Gurmukhi Numbers
- Hebrew Numbers
- Hindi Numbers
- Binary Numbers
- Braille
- English Words
- Spanish Words
- Math Prefixes
- Polygons
- US Coins
- US Dollars
- Area Fractions
- Bar Fractions
- Fractions
- Random Design

MATH GOALS:
- Number & Operations
- Number Sense
- Addition
- Subtraction
- Money
- Problem Solving
- Mathematical Reasoning
- Math Enjoyment

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www.mathdoodles.com

Please take a look at these other Math Doodle apps:

SUMS STACKER - iPhone/iPodTouch

CONNECT SUMS - iPhone/iPodTouch

MATH DOODLES - iPad App

SYMMETRY SHUFFLE - iPad App
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