主题：[The Official SAT Question of the Day™] November 14th Friday

Hint : Let s be the length of a side of one of the small squares. Express the perimeter of the large rectangle in terms of s and set this equal to 30 to get an equation that can be solved to find s. Knowing the value of s will enable you to find the perimeter of one of the small squares.

Correct Answer: E

• Here's Why: The perimeter of one of the small squares can be found if you know the measure of one of its sides. So let s be the measure of a side of one of the small squares. Then the perimeter of the large rectangle is equal to 3s + 3s + 2s + 2s = 10s. Since you know that the perimeter of the rectangle is 30, you know that 10s = 30. So s = 3. Therefore, the perimeter of one of the small squares is 4 × 3 = 12.
  
  
• Difficulty: Medium
• Question Type: Standard Multiple Choice
  (Mathematics)