Divisibility Tests
Is 56 divisible by 2?
Yes
What are the factors of 7?
1, 7
8, 16, 24, 32, 40, 48... These numbers are the multiples of...
8
What is the first prime number?
2
What is the greatest common factors of 9 and 27?
What is 9?
Is 147 divisible by 1, 3 , and/or 5?
1 and 3
1, 2, 3, 5, 6, 10, 30 Are these ALL of the factors of 30?
No, we are missing 15
What is the Least Common Multiple of 6 and 9?
What is 18
How many factors do all prime numbers have?
2
What is the GCF of 12 and 45?
What is 3
Is 55,552 divisible by 5?
No
These are the factors of which number? (They are not in order!) 12, 3, 4, 8, 6, 1, 24, 2
24
What is the Least Common Multiple of 12 and 48?
48
Is 51 a prime or composite number? Why?
Composite. It has more than 2 factors.
What is the GCF of 15 and 25?
What is 75?
Is 360,021,004 divisible by 3?
No
List the factors of 32
1, 2, 4, 8, 16, 32
What number is the least common multiple of 3 and 36?
36
List the first 7 primes!
2, 3, 5, 7, 11, 13, 17
What is the GCF of 24 and 40?
What is 8
Is 345 divisible by 2, 3 and/or 5?
Divisible by 3 and 5 only
List the factors of 40
1, 2, 4, 5, 8, 10, 20, 40
What is the least common multiple of 25, 5, and 10?
50
Is 31 prime or composite? Why?
Prime. It has exactly two factors: 1 and itself
What is the GCF of 12 and 15?
What is 1