Prime Time
Wide Array of Knowledge
Hip to Be Square
Invincibility of Divisibility
The X Factor
100
Identify the prime numbers - 1 - 2 - 13 - 16 - 33 - 37 - 42 - 49 - 54
2, 13, 37
100
Draw one rectangular array for 15 -
Any of these: 1 x 15, 15 x 1, 3 x 5, 5 x 3
100
9^2 = ???
81
100
For this number - 18 - indicate whether it is divisible by 2, 3, 5, 6, 9, and/or 10.
2, 3, 6, 9
100
List ALL the factors for 24 -
1, 2, 3, 4, 6, 8, 12, 24
200
Define Composite Numbers
Numbers with more than 2 factors
200
Draw a rectangular array for this number model - 3 x 4
3 rows by 4 columns
200
Fill in the blank - ___^2 = 121
11
200
For this number - 60 - indicate whether it is divisible by 2, 3, 5, 6, 9, and/or 10.
2, 3, 5, 6, 10
200
Make a factor rainbow for 28 -
1, 2, 4, 7, 14, 28
300
How many prime numbers are there between 10 and 20?
There are four prime numbers between 10 and 20 (11, 13, 17, 19)
300
Draw 3 rectangular arrays for 18 -
Any of these: 1 x 18, 18 x 1, 2 x 9, 9 x 2, 3 x 6, 6 x 3
300
What is the square root of 64?
8
300
For this number - 801 - indicate whether it is divisible by 2, 3, 5, 6, 9, and/or 10.
3, 9
300
Write the prime factorization for 36 -
2 x 2 x 3 x 3 OR 2^2 x 3^2
400
Define Prime numbers -
Prime numbers have only 2 factors, 1 and itself.
400
Draw a rectangular array for 21 with THREE ROWS, and write the number model -
3 x 7
400
Is 77 a square number?
No.
400
Which of the following numbers are divisible by 3? - 1,432 - 333 - 50,241 -
333 and 50,241
400
Make a factor tree for 40 -
Example: 40 - 4 * 10 - 2 * 2 * 2 * 5
500
Name 3 prime numbers between 50 and 100
53, 59, 61, 67, 71, ...
500
Is it possible to make 4 different arrays for the number 19? Why or why not?
No. It is a prime number, it has only 2 factors, so you can only make 1 x 19 and 19 x 1.
500
Something is wrong with this expression. Fix it. 5^2 = 5 x 2 = 25
5^2 = 5 x 5 = 25
500
Which of the following numbers are divisible by 6? - 25 - 42 - 138 - 270 - 272 - 5,400 - 93 -
42 - 138 - 270 - 5,400
500
Write the prime factorization for 60 in exponential notation - (from least to greatest)
2^2 x 3 x 5
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