What will be the next two terms in (90,80,70,60,\ldots)?
Answer and explanation
Correct answer: (50, 40)
Each term in this sequence is 10 less than the preceding term, so the common difference is \(d=-10\). After 60, we get \(60-10=50\), and then \(50-10=40\). Hence, the next two terms are (50, 40). (55, 50) is incorrect because it uses a difference of -5. Exam tip: first check the difference between consecutive terms before finding later terms.
Frequently asked questions
What is the correct answer to this question?
(50, 40)
Why is this the correct answer?
Each term in this sequence is 10 less than the preceding term, so the common difference is \(d=-10\). After 60, we get \(60-10=50\), and then \(50-10=40\). Hence, the next two terms are (50, 40). (55, 50) is incorrect because it uses a difference of -5. Exam tip: first check the difference between consecutive terms before finding later terms.
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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