Questions: Skip Counting by 5s

Question 1

What number comes next in this sequence: 10, 15, 20, 25, ___?

• A. 28
• B. 29
• C. 30
• D. 35

Answer: (C)

Each number in the sequence is 5 more than the one before it. 25 + 5 = 30. The pattern of skip counting by 5s always adds 5 each time.

Question 2

When skip counting by 5s, most number in the sequence ends in 5.

• T. True
• F. False

Answer: False

Numbers in the skip-count-by-5s sequence alternate between ending in 5 and ending in 0: 5, 10, 15, 20, 25, 30... Half end in 5 and half end in 0. The rule is that they always end in either 5 or 0.

Question 3

Name one real-life situation where skip counting by 5s is useful.

Model answer: Counting nickels (each worth 5 cents), reading minutes on a clock (each mark is 5 minutes), or counting objects in groups of 5.

Skip counting by 5s appears naturally whenever things come in groups of 5. Clock faces mark minutes in 5-minute intervals, and nickels are worth 5 cents each, making skip counting the fastest way to find the total.