Grade 2 Math Puzzle 1: Count both ends in two groups

A free grade 2 math puzzle that teaches Count both ends in two groups. Try it first — the hint and the full solution open when you are ready.

Problem 1 · Count both ends in two groups · 3 points

Made by AI and not reviewed by a real person.

Mia stamps the pages numbered 17 through 42, but she skips pages 25 through 30 because they already have stamps. How many pages does she stamp?

Show a hint

Think about the pages before the skipped pages and the pages after them. How can you count each group without listing every page?
Count pages 17 through 24, then pages 31 through 42. In each group, remember the page where Mia starts.

Show the answer and solution

Answer: A — 20

Mia stamps pages 17 through 24, which is 8 pages, and pages 31 through 42, which is 12 pages. She stamps 8 + 12 = 20 pages. The answer 18 comes from subtracting the numbers at the ends of each group but forgetting to count the starting page in each group.

Grade 2 puzzle 1: Count both ends in two groups

Problem 1 · Count both ends in two groups · 3 points