My Secret Number Project
• Choose a number from 10-100
• Model the factorization of the number as an array, area
model, factor pair rainbow or factor tree.
• Give the prime factorization of the number.
• Write at least three mystery clues using number
properties such as factor, multiple, odd, even, prime,
composite, perfect square.
• Research interesting facts about how the number is
used in the world around us.
• Present information in a mini-poster or ppt slide show
My Secret Number
• Prime factorization
2 x 2 x 3 or 22 x 3
• Arrays
1x12
2x6
Clue 1:
Composite number
smaller than 20
Clue 2:
Divisible by 2, 3
and 4
Clue 3:
My square is 144
3x4
• Math Facts
12 inches = 1 foot
Even pattern in units digit of multiples12, 24, 36, 48, 60
• Interdisciplinary Connections
*12 people on a jury
*12 disciples of Jesus
*Apollo 12 space mission
My Secret Number
1x34
»Prime factorization
2x17
Clue 1:
Composite number
between 25 and 50
Clue 2:
2 prime factors with
a sum of 19
Clue 3:
Third multiple is 102
2 x 17
»Arrays
» Math Facts
*Digits are consecutive
numbers
*Texas Instruments® TI-34
MultiView™ Scientific Calculator
» Interdisciplinary
Connections
*Jersey # of GA Bulldog &
1982 Heisman Trophy winner,
Herschel Walker
*My husband’s pant size
My Secret Number
• Prime factorization
2 x 5 x 5 or 2 x 52
5x10
• Arrays
2x25
1x50
Clue 1:
Composite number
greater than 20
Clue 2:
sum of its digits is 5
• Math Facts
∞number of years in half a century
∞ my age rounded to the nearest ten
∞ the sum of three squares 32+42+52
• Interdisciplinary Connections
∞ Fifty Ways to Leave Your Lover, a song
by Paul Simon
Clue 3:
∞ The atomic number of tin
Multiples always end in 0
WORD
EXCEL
ARRAYS
1x13
Create in . . .
-Word, insert &
format table, insert
symbol or
-Excel, format &
shade cells or
-Take a screenshot at
NCTM array link on
wiki and insert as a
picture
SCREENSHOT