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# Celebrating our favorite pattern!

Nov 23, 2022 |

November 23 is Fibonacci Day, commemorating the Italian mathematician Leonardo of Pisa and the pattern of numbers he popularized, the Fibonacci sequence. Observing the beginning of this sequence, you will notice why we celebrate on this day: 0, 1, 1, 2, 3, 5, 8, 13, …

Written in the date format month/day, you see the date 11/23 or November 23.

##### Fibonacci Sequence

Leonardo of Pisa (c. 1170-1250), nicknamed “Fibonacci,” introduced this number sequence to the Western World during the Middle Ages. But he was not the first to observe this special pattern of numbers. As early as 200 B.C., the sequence appeared in mathematics from India.

Fibonacci shared the interesting mathematical properties of this sequence in his “Book of Calculation,” which he had gathered from early life travels to North Africa. It wasn’t until the late 1800s that the series was named after Fibonacci as a tribute to his work!

A number sequence is an ordered list of numbers defined by a rule or function — in other words, a pattern. Each number in the sequence is called a term.

It may be challenging to determine the rule for the Fibonacci sequence when looking at what is happening in between each number; unlike most numeral patterns that we learn as kids, the change is different. To find the rule, look at the numbers themselves.

Rule: To get to the next term, add the two previous terms together.

The Fibonacci sequence is infinite since it has an unlimited number of terms and goes on indefinitely.

A Cool Math Fact: Begin the sequence with 1. From here, every third term is divisible by 2; every fourth term is divisible by 3; every fifth term is divisible by 5; every sixth term is divisible by 8; every seventh term is divisible by 13; and so on.

Example:
Every third term of the sequence is: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, …
These terms are all divisible by 2.

Every fourth term of the sequence is: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, …
These terms are all divisible by 3.

Every fifth term of the sequence is: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, …
These terms are all divisible by 5.

##### Fibonacci Numbers in the Real World

Fascination with the Fibonacci sequence of numbers extends beyond mathematics. This pattern appears quite frequently in nature and the real world!

When Leonardo of Pisa first presented the sequence, he posed a population-growth scenario with rabbits. The overall problem showed that after each month, the number of pairs of rabbits increased following the Fibonacci pattern.

From flower petals to pineapples, many elements in nature follow some portion of the Fibonacci sequence. Fibonacci numbers can be turned into tiles (the terms dictate the side lengths of each square), and a Fibonacci Spiral can be constructed by connecting the opposite corners of the squares. This spiral is easy to spot in natural settings, for example, the spiral arrangement on pinecones; the numbers of spirals correspond to Fibonacci numbers. In this example, we see 8 spirals counted clockwise and 13 spirals counted counter-clockwise!

The Fibonacci sequence is also used in computer algorithms, architecture, and design. If you divide pairs of consecutive terms in the sequence, the quotients (or ratios), move closer and closer to the irrational number phi (approximately 1.6), otherwise known as the Golden Ratio. Artists have long found this ratio to present the most aesthetically pleasing art.

We’re sure Fibonacci would agree: Math is so cool! The Fibonacci sequence shows us that even within one unique number pattern, there are so many things going on! Take some time today to explore more patterns around you.

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Results based on location:
Ashburn 0.93 mi
43330 Junction Plaza
#160
Ashburn, VA 20147
Sterling 4.07 mi
44 Pidgeon Hill Drive
#100
Sterling, VA 20165
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Ashburn 0.93 mi
43330 Junction Plaza
#160
Ashburn, VA 20147
Sterling 4.07 mi
44 Pidgeon Hill Drive
#100
Sterling, VA 20165
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521 E Market St
#B
Leesburg, VA 20176
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#J2
Herndon, VA 20171
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42020 Village Center Plaza
#100
Stone Ridge, VA 20105
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Reston, VA 20194
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1020 E Main St
Ste L
Purcellville, VA 20132
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12150 Darnestown Rd
Gaithersburg, MD 20878
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5959 Centreville Crest Ln
Centreville, VA 20121
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Fairfax, VA 22030
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#B
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Germantown, MD 20874
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328 Maple Ave E
#A
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15125 Washington St
Haymarket, VA 20169
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#106
Rockville, MD 20850
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Suite #190
McLean, VA 22101
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9132 Rothbury Drive
Gaithersburg, MD 20886
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5268 Nicholson Ln
#N
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6674 Arlington Blvd
Falls Church, VA 22042
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9722 Liberia Ave
Manassas, VA 20110
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12705 Braemar Village Pz
Bristow, VA 20136
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9411 Old Burke Lake Rd
#C
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4918 Fairmont Ave
Bethesda, MD 20814
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7000 Columbia Pike
Annandale, VA 22003
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Damascus, MD 20872
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Arlington, VA 22203
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3706 Macomb St NW
Washington, D.C., DC 20016
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18157 Village Center Dr
Olney, MD 20832
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Silver Spring, MD 20910
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9027 Silverbrook Rd
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Frederick, MD 21701
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732 Cloverly Street
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512 Fletcher Drive
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1207 Liberty Rd.
#D-104
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Winchester, VA 22601
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8827 Centre Park Drive
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Stafford, VA 22554
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Bowie, MD 20721
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Waldorf, MD 20601
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1153 Route 3 North
#120
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Owings Mills, MD 21117
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1433 Reisterstown Rd
Pikesville, MD 21208
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10735 Town Center Blvd
#7
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558 Ritchie Highway
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600 Wyndhurst Ave
Baltimore, MD 21210
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Annapolis, MD 21401
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#210
Fredericksburg, VA 22407
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4136 E Joppa Rd
#J
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516 Baltimore Pike
Bel Air, MD 21014