Mastering Divisibility Rules for 3, 6, and 9

What is the first step to check if a number is divisible by 3?

• Divide the number by 3 directly

• Check if the number is even

• Add up all the digits of the number

• Subtract 3 from the number

If the sum of the digits of a number is 15, is the number divisible by 3?

• No, because 15 is an odd number

• Yes, because 15 is an even number

• No, because 15 is not a multiple of 3

• Yes, because 15 is a multiple of 3

What is the sum of the digits of the number 1,369?

• 21

• 19

• 20

• 18

What two conditions must be met for a number to be divisible by 6?

• The number must be even and divisible by 3

• The number must be odd and divisible by 3

• The number must be even and divisible by 9

• The number must be odd and divisible by 9

If a number ends in 8, is it divisible by 2?

• No, because it ends in 8

• Yes, because it ends in 8

• No, because it is an odd number

• Yes, because it is an even number

What is the sum of the digits of the number 7,284?

• 20

• 23

• 21

• 22

What is the rule for checking if a number is divisible by 9?

• Subtract 9 from the number

• Check if the number is even

• Divide the number by 9 directly

• Add up all the digits and check if the sum is divisible by 9

If the sum of the digits of a number is 27, is the number divisible by 9?

• Yes, because 27 is a multiple of 9

• No, because 27 is not a multiple of 9

• Yes, because 27 is an even number

• No, because 27 is an odd number

What is the simplified sum of the digits of 27?

• 10

• 9

• 8

• 7

If the sum of the digits of a number is 25, what is the next step to check for divisibility by 9?

• Divide 25 by 9

• Subtract 9 from 25

• Add the digits of 25

• Multiply 25 by 9