Counting by Nines Quiz

What is the first number you start with when counting by nines?

• Seven

• Nine

• Eleven

• Thirteen

When counting by nines, what is the sum of the digits in the number 18?

• 7

• 10

• 9

• 8

What is the next number in the sequence: 9, 18, 27, 36, 45?

• 81

• 54

• 63

• 72

Which number comes after 72 when counting by nines?

• 83

• 82

• 81

• 80

What is the final number reached when counting by nines up to 180?

• 189

• 180

• 171

• 198