Divisibility Rules for 3 and 9
Interactive Video
•
Mathematics
•
4th - 6th Grade
•
Practice Problem
•
Hard
Wayground Content
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a quick method to determine if a number is divisible by 3?
Sum the digits and see if the sum is divisible by 3.
Divide the number by 2 and check for no remainder.
Multiply the digits and check if the product is divisible by 3.
Check if the number is even.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the sum of the digits of a number is 16, is the number divisible by 3?
No, because 16 is a prime number.
Yes, because 16 is an even number.
Yes, because 16 is divisible by 3.
No, because 16 is not divisible by 3.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you quickly check if a number is divisible by 9?
Multiply the digits and check if the product is divisible by 9.
Check if the number is a multiple of 5.
Sum the digits and see if the sum is divisible by 9.
Divide the number by 3 and check for no remainder.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is the number 378 divisible by 9?
Yes, because the sum of its digits is 18, which is divisible by 9.
No, because 378 is a prime number.
No, because the sum of its digits is 18, which is not divisible by 9.
Yes, because 378 is an even number.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sum of the digits of 378?
16
18
21
24
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