Divisibility Rules
What is the divisibility rule for 2?
If the number is even, then the number is divisible by 2.
3^4
Find the GCF of 4 and 12.
4
Simplify the fraction: 10/25
2/5
1/2 + 3/2
(In simplest form.)
2
What is the divisibility rule for 5?
If the number ends in a 0 or a 5, then the number is divisible by 5.
Find the prime factorization of 12.
2^2 × 3
Find the GCF of 8 and 64.
8
Simplify the fraction: 16/24
4/5 - 3/5
(In simplest form.)
1/5
What is the divisibility rule for 3?
If all the digits added up together are divisible by 3, then the number is divisible by 3.
Find the prime factorization of 100.
2^2 × 5^2
Find the GCF of 12 and 36.
12
Simplify the fraction: 9/12
3/4
17/10 - 12/10
(In simplest form.)
1/2
What is the divisibility rule for 4?
If the last two digits are divisible by 4, then the number is divisible by 4.
Find the prime factorization of 121.
11^2
Find the GCF of 9 and 15.
3
Simplify the fraction: 15/50
3/10
11/21 + 3/21
(In simplest form.)
1/3
What is the divisibility rule for 6?
If the number is divisible by BOTH 2 and 3, then the number is also divisible by 6.
Find the prime factorization of 83.
PRIME
Find the GCF of 16 and 24.
8
Simplify the fraction: 14/84
1/6
15/7 - 9/7 + 1/7
(In simplest form.)
1