Factor
List the factors of 20. Use the "U"method.
1,2,3,4,10,20
List the first 5 multiples of 31
0, 31, 62, 93, 124
Sq Root 49
7
Use the prime factorization method to find both the GCF and LCM of (360,160)
GCF = 40
LCM = 1,440
True or false: Any multiple of 2 is called an odd number.
FALSE, any multiple of 2 is called an even number.
Using the divisibility rules for 2,3,4,5,9, and 10 state which are factors of:
1147
None
List the first 5 multiples of 19.
0, 19, 38, 57, 76
Sq Root 121
11
Use the prime factorization method to find both the GCF and LCM of (27, 51)
GCF = 3
LCM = 459
Provide an explanation for why 1 is neither prime nor composite.
One only has one factor (itself). Therefore, it does not fit the characteristics of prime numbers (2 factors), nor the characteristics of composite numbers (more than 2 factors).
Using the divisibility rules for 2,3,4,5,9, and 10 state which are factors of:
102,030
2,3,5,10
If a number is a multiple of both 3 and 7, it must be a multiple of what other number?
21
Sq Root 81 + Sq Root 144
20
Use the prime factorization method to find both the GCF and LCM of (56, 196)
GCF = 28
LCM = 392
Provide an explanation for why the GCF of two numbers must be less than both numbers or equal to the smaller number.
Factors are numbers that multiply to result in a given number. Factors must be less than or equal to the number they are a factor of. Therefore, the GCF of two numbers has to be less than both numbers or equal to the smaller number.
Give the prime factorization of 196.
22 x 72
What number is a multiple of every whole number?
0
Sq Root 360 + 40
20
Use the prime factorization method to find both the GCF and LCM of (15, 29)
GCF = 1
LCM = 435
Ella practices the piano every third day and she practices the trumpet every fifth day. She practiced both instruments on February 1st. What is the next day she will practice both instruments on the same day?
Since the LCM of 3 and 5 is 15, the next time she would practice both instruments on the same day would be 15 days later, or February 16th.
Give the prime factorization of 693.
32 x 7 x 11
List the first 5 multiples of 1250.
0, 1250, 2500, 3750, 5000
Sq Root 625
25
Use the prime factorization method to find both the GCF and LCM of (18, 24, 28)
GCF = 2
LCM = 504
A candy bar producer puts a coupon for a free bar in every 80th bar and a coupon for two free bars every 180th bar. How often does the producer put both coupons in a single bar?
Every 720th bar