Mathematical Dispositions

1. How many 2 by 1 by 1 blocks (length by width by height) make up this structure if at least one face of each block is visible? How many 1 by 1 by 1 blocks would be required to make the same structure?

2. Here is a pattern for making a cube (three-dimensional shape with six squares for sides – such as a die). The thin "tabs" are to be folded for gluing. Using a piece of graph paper, design another pattern for a cube. Or try another shape, like a pyramid or tetrahedron.

Fibonacci numbers are numbers of the following sequence: 1, 1, 2, 3, 5, 8, 13, 21 ... where successive numbers are the sum of the two preceding numbers. This sequence of numbers or patterns formed by this sequence appears naturally in the environment. Find a leaf, stem, pinecone, or seashell with the spiral pattern shown here. Look for this pattern elsewhere in nature or art.

Draw your own spiral on a piece of graph paper following these direction.

1. Select one square near the center and trace it.
2. Trace in one square to the right.
3. Trace in on square that is 2 block by 2 blocks (2 x 2) above the two previous squares.
4. Trace in a square that is 3 by 3 to the left.
5. Trace in a square below that is 5 by 5.
6. To the right, trace in a square 8 by 8.
7. Above, trace in a square 13 by 13.
8. Continue as long as you have room on the paper.
9. Beginning in the first square, connect the corners of each square in the same sequence with a looping spiral, like that of a nautilus shell.

That spiral is a Fibonacci pattern!

1. Predict the number that would come next. What is each pattern?

• 2, 3, 5, 7, 11, 13, 17, 19, ____, ____
• 1, 4, 9, 16, 25, ____, ____
• 1, 3, 4, 7, 11, 18, ____, ____

Using a hundreds chart (1 to 100), explore the concepts of multiples and factors (prime and composite numbers):

• Circle 2 and strike through all multiples of 2.
• Circle 3 and strike through all multiples of 3.
• Continue with 5, 7, 11, 13, 17.
• (The number 1 is neither prime nor composite.)
• Circle all numbers not crossed out. these are prime numbers and don't have factors other than one and themselves. this process is called the "Sieve of Erathsthenes" after the Greek mathematician (275–195 B.C.E.) given credit for this simple method for identifying prime numbers (Wolfram, 2002).

1. Take a walk around your neighborhood and make a list of all the mathematics application you spot.

2. Look through a newspaper and make a list of all the math applications (obvious and hidden). Some examples of obvious application: weather charts, stock market, sports statistics, grocery sales. Hidden applications: probability of events, statistics within an article, graphs, reports on science and technology.

Obtain a set of 28 dominoes, or print and cut out a set. Study the dot patterns and count up the groupings. The pieces are sometimes called bones, the dots are called pips. Any group of bones with a common end is called a suit, and bones with identical ends are called doublets.

Make up a game for two players or follow the rules below for a simple game. (More complex rules can be found online or in a book on dominoes.)

• Place all pieces facedown and shuffle them around.
• Draw for the lead by selecting the piece with the highest number and reshuffle. Each placyer then draw seven bones.
• The lead player usually plays his highest domino first. The object of this game is to have the fewest pips left in hand.
• The second player must play a piece that matches one end of a piece on the table. Coublets are played crosswise. Players who cannot make a match must draw another bone.
• The player who matches all bones in his hand calls "Domino" and earns the number of points as there are pips in his opponent's hand.