Show:
Prime Numbers
(Lowest Common) Multiples
(Greatest Common) Factors
Divisibility Rules
Potpourri
100
Has only 1 and itself as factors.
What is a prime number.
100
A multiple is always _________ than the number itself.
What is larger.
100
A factor is always ________ than the number.
What is smaller.
100
The digits must add to a number divisible by 3.
What is the divisibility rule for 3.
100
A factor set should always be enclosed with _______.
What are curly brackets { }
200
The next prime number after 19.
What is 23.
200
The 4th multiple of 3.
What is 12
200
The factor set of 12.
What is {1, 2, 3, 4, 6, 12}
200
The number must end in 5 or 0.
What is divisibility rule for 5.
200
A number has 5 factors. It is prime or composite?
What is composite.
300
The greatest common factor of any two prime numbers.
What is 1.
300
The lowest common multiple of 4 and 6.
What is 12.
300
A number has prime factors of 2, 3 Another number has prime factors of 2, 3, 5 What is the GCF of the two numbers?
What is 2x3 = 6
300
312 is divisible by ____.
What is 4.
300
5.
What is the greatest common factor of 15 & 20.
400
A number that has more than 2 factors.
What is a composite number.
400
A number has prime factors of 3, 5, 5 Another number has prime factors of 2, 3, 5 What is the LCM of the two numbers?
What is 2x3x5x5 = 150.
400
A number has prime factors of 2, 2, 3, 7 Another number has prime factors of 2, 2, 2, 3 What is the GCF of the numbers?
What is 2x2x3 = 12.
400
True or false: ________ is divisible by 11.
What is ______.
400
A 3-digit number divisible by 2, 4, 5.
What is 120.
500
The reason why 1 is considered neither prime NOR composite.
What is because it has only one factor: 1.
500
A number has prime factors of 2, 2 & 3. Another number has prime factors of 2, 3, 5. The LCM of the two numbers is ______________.
What is 2x2x3x5 = 60.
500
The GCF of 12 and 30 is determined to be 36. Explain why this cannot be true.
What is because the GCF must be smaller than the two numbers.
500
14124 is divisible by _____, ______, ______ and ______.
What is 2, 3, 6, 11.
500
The only number with infinite factors.
What is 0.