Divisibility by Three Quiz

What is the trick to determine if a number is divisible by three?

• Divide the number by three and check the remainder.

• Subtract three from the number repeatedly until you reach zero.

• Add the digits of the number and see if the sum is 3, 6, or 9.

• Multiply the digits of the number and check if the product is a multiple of three.

Using the digit-adding method, is the number 82 divisible by three?

• Yes, because the sum of the digits is 10.

• No, because the sum of the digits is 10, which is not divisible by three.

• No, because the sum of the digits is 1, which is not divisible by three.

• Yes, because the sum of the digits is 1.

Which of the following numbers is divisible by three using the digit-adding method?

• 85

• 86

• 84

• 83

How can you make the process of checking divisibility by three faster?

• By writing down all possible multiples of three.

• By using a calculator for all calculations.

• By grouping numbers in a way that makes sense to you.

• By memorizing the three times table.

What should you do after mastering the divisibility trick?

• Forget about it and move on.

• Share it with friends and family.

• Use it only in exams.

• Keep it to yourself as a secret.