Show:
Divisibility
Prime/Composite
Factor Tree
GCF
LCM
100
Is 124 divisible by 2
yes
100
Is it prime or composite? 14
composite
100
Write using exponents: 2 x 2 x 3 x 3 x 5
2 ^2x 3^2x 5
100
Find the GCF of 6 and 15
3
100
Find the LCM of: 6 and 14
42
200
Is 15 divisible by 6
No
200
Is it prime or composite? 17
prime
200
Write using exponents and solve: 2x2x2x2x3
2^4 x 3= 48
200
Find the GCF of: 40 and 50
10
200
Find the LCM of: 9 and 12
36
300
What is the rule for divisibility by 2?
The number is an even number
300
Is it prime or composite? 45
composite
300
Draw a factor tree for 16, write using exponents.
2^4
300
Find the GCF of: 36 and 57
3
300
Find the LCM of: 5, 6 and 10
30
400
What is the rule for divisibility of 3?
The sum of the digits is divisible by 3.
400
What makes a number prime?
a prime number only has 2 factors (1 and itself)
400
Draw a factor tree, write using exponents: 39
3x13
400
Find the GCF of: 8, 28,52
4
400
Find the LCM of: 12 and 20
60
500
What is the rule of divisibility by 5?
The last digit is 5 or 0.
500
What makes a number composite?
It has more than 2 factors.
500
Draw a factor tree, write using exponents. 175
5^2 x 7
500
Find the GCF of: 12, 18, and 42
6
500
Find the LCM of: 12, 16 and 24
48