Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

What will be the 10th term in the sequence 1, 5, 2, 10, 4, 20, 8, ...?

Answer and explanation

Correct answer: 80

The governing idea is to separate an interleaved sequence into its odd-position and even-position terms. The odd-position terms are 1, 2, 4, 8, ..., and each doubles. The even-position terms are 5, 10, 20, 40, 80, ..., and each also doubles. Because position 10 is even, we use the even-position subsequence. Its terms are: position 2 gives 5, position 4 gives 10, position 6 gives 20, position 8 gives 40, and position 10 gives 80. Therefore the tenth term is 80, so option D is correct. The values 16 or 32 come from following the odd-position pattern or confusing the original position with the index within one subsequence. The position parity must be checked first.

Related tags

SequencesInterleaved-PatternTerm-PositionParitySequences And ProgressionsMathematicsClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.