Download More on Divisibility Rules Write the rule for each. 1. A number is

More on Divisibility Rules
Write the rule for each.
1. A number is divisible by 5 if the number ends in 0 or 5.
2. A number is divisible by 4 if last two digits are divisible by 4.
3. A number is divisible by 2 if the number ends in an even number.
4. A number is divisible by 3 if the sum of the digits is divisible by 3.
5. A number is divisible by 10 if the number ends in 0.
6. A number is divisible by 6 if the number is divisible by both 2 and 3.
7. A number is divisible by 9 if the sum of the digits is divisible by 9.
Read and circle the appropriate numbers.
8.
Circle the numbers that are divisible by 5.
145, 80
9.
Circle the numbers that are divisible by 9.
189, 945, 351
Find the sum of the digits on each
number to prove your answer.
10.
Circle the numbers that are divisible by 2.
148, 86
11.
Circle the numbers that are divisible by 4.
188, 236, 1048
Be sure to look at the last two digits.
Remember that 4 will only divide into even numbers.
12.
Circle the numbers that are divisible by 10.
870, 510
13.
Circle the numbers that are divisible by 3.
87, 54, 93, 57, 81
Find the sum of digits on each
number to prove your answer.
14.
Circle the numbers that are divisible by 6.
144, 96, 72, 84
Check each number for divisibility by both 2 and 3.
Remember that 6 will only divide into even numbers.
For each question, circle the numbers that the original number is divisible by.
Example
Circle all the numbers 150 is divisible by.
2, 3, 4, 5, 6, 9, 10
You would circle 2, 3, 5, 6, and 10.
15.
Circle all the numbers 87 is divisible by.
3
16.
Circle all the numbers 54 is divisible by.
2, 3, 6, 9
17.
Circle all the numbers 13 is divisible by.
18.
Circle all the numbers 75 is divisible by.
3, 5
19.
Circle all the numbers 120 is divisible by.
2, 3, 4, 5, 6, 10
20.
Circle all the numbers 84 is divisible by.
2, 3, 4, 6
Here is reason to learn the divisibility rules –
A prime number is a number that has only two factors, one and itself.
This means that the only two numbers that divide into the given number are one and itself.
Here are the prime numbers between 0 and 20 –
2, 3, 5, 7, 11, 13, 17, 19
21.
Use the divisibility rules to identify the prime numbers between 20 and 40.
Circle prime numbers.
23, 29, 31, 37
22.
Use the divisibility rules to identify the prime numbers between 50 and 70.
Circle prime numbers.
53, 59, 61, 67
A composite number is a number that has more than 2 factors.
This means that there is another number besides one and itself that divide into the given number.
Here are the composite numbers between 0 and 20 –
4, 6, 8, 9, 10, 12, 14, 15, 16, 18
23.
Use the divisibility rules to identify the composite numbers between 40 and 60.
Circle the composite numbers.
42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58
24.
Use the divisibility rules to identify the composite numbers between 80 and 100.
Circle the composite numbers.
81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96,
98, 99