Rows of stairs use (8,11,14,17,\ldots) bricks. What is the common difference of this arrangement?
Answer and explanation
Correct answer: 3
To find the common difference, subtract consecutive terms: 11 - 8 = 3 and 14 - 11 = 3. Since each successive row has 3 more bricks, the common difference is 3. Here, 8 is the first term, not the common difference. Exam tip: In an AP, common difference = second term − first term.
Frequently asked questions
What is the correct answer to this question?
3
Why is this the correct answer?
To find the common difference, subtract consecutive terms: 11 - 8 = 3 and 14 - 11 = 3. Since each successive row has 3 more bricks, the common difference is 3. Here, 8 is the first term, not the common difference. Exam tip: In an AP, common difference = second term − first term.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Arithmetic Progressions (AP). Topic: Introduction to APs and common difference..
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