Understanding Number Lines and Multiples of 10

What number does a point represent on a number line that starts at 10 and ends at 20, if the point is the fourth tick mark from the start?

• 14

• 13

• 12

• 15

On a number line from 70 to 80, where each tick mark represents two whole numbers, what number does the third tick mark represent?

• 72

• 74

• 78

• 76

Which number line correctly represents the number 45?

• A number line from 30 to 40

• A number line from 60 to 70

• A number line from 50 to 60

• A number line from 40 to 50