Level 44 • 5/50 questions • 30 seconds per question.
Login to save your score, XP, coins and progress.
D. (62)
अगला अंतर (15) होगा इसलिए छठा पद (47+15=62) है। बदलते अंतरों को अलग पंक्ति में लिखना उपयोगी रहता है। / The next difference is (15), so the sixth term is (47+15=62). Exam tip: write changing differences separately.
Login to save your score, XP, coins and progress.
In the sequence \(1,3,6,10,15,\ldots\), which term is (45)?
B. (9)वाँ(9)th
यह त्रिभुजीय अनुक्रम है और (T_n=\frac{n(n+1)}{2}) होता है। \(\frac{9\times10}{2}=45\) इसलिए यह (9)वाँ पद है। / This is a triangular sequence with (T_n=\frac{n(n+1)}{2}). Since \(\frac{9\times10}{2}=45\), it is the (9)th term.
Login to save your score, XP, coins and progress.
B. (34)
आगे के पद (21,34) हैं इसलिए आठवाँ पद (34) है। पुनरावर्ती अनुक्रम में पद छोड़ना नहीं चाहिए। / The next terms are (21,34), so the eighth term is (34). Exam tip: do not skip steps in recursive sequences.
Login to save your score, XP, coins and progress.
C. (42)
छठा पद (16+26=42) और सातवाँ पद (26+42=68) नहीं है क्योंकि पाँचवाँ (26) है। ध्यान से गिनने पर छठा (42) और सातवाँ (68) होगा। / The sixth term is (16+26=42) and the seventh is (26+42=68). Exam tip: count positions carefully in recursive sequences.
Login to save your score, XP, coins and progress.
D. (29)
आगे (16,22,29) मिलते हैं इसलिए आठवाँ पद (29) है। क्रमागत जोड़ को पूरा लिखना गलती घटाता है। / Continuing gives (16,22,29), so the eighth term is (29). Exam tip: write each successive addition to avoid mistakes.
Login to save your score, XP, coins and progress.
This level is designed for 50 active questions. Currently 5 questions are available for the selected class and difficulty.
Yes, the timer uses 30 seconds per question for Hard difficulty and shows the total remaining time on the page.
Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.
Use Google login or mobile OTP. Admin can block users and control login providers.