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Sequences And Progressions

Class 9 Mathematics के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

MathematicsIf \(S_n=\frac{n(n+1)}{2}\), what is the value of \(S_{2n}\) when \(n=15\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n=595), what is (S_{n+6}-S_n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat remains when (1+2+\cdots+50) is subtracted from (1+2+\cdots+80)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n=2485), what is the value of (S_n-S_{n-5})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat is the ratio of the sum of the first (25) natural numbers to the sum of the first (10) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf Sₙ − S₍ₙ₋₁₎ = 57, what is the value of Sₙ?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhen is the sum of the first n natural numbers odd?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf Sₙ = 1275, what is the value of S₍ₙ₊₃₎?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat is the difference between the sums of the first (60) and first (40) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n-S_{n-4}=250), what will be the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf \(S_n=\frac{n(n+1)}{2}\) and \(S_n=861\), what is the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat is obtained by subtracting the sum of the first (62) natural numbers from the sum of the first (67) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsFind the value of S₍₂₅₎ + S₍₂₇₎, where Sₙ denotes the sum of the first n natural numbers.Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat is the sum of the first (80) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat sum is obtained by adding 53 + 54 + 55 to 1 + 2 + ⋯ + 52?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Easy MathematicsIf (S_a=820) and (S_b=1035), what is (b-a)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat will be the sum of the first (68) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsIf the sum of the first (t) natural numbers is (231), what is the value of (t+5)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsIn a triangular decoration, flowers are arranged in rows from 1 to 28. How many flowers are there in total?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Easy MathematicsWhat is the ratio of (S_{30}) to (S_{15})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium