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

MathematicsIf (S_n-S_{70}=5250), what is the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsIf (S_n=7875), what is the value of (S_{n-7})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsIf \(S_n\) denotes the sum of the first \(n\) natural numbers, which of the following relations is always true?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is the ratio of (S_{72}) to (S_{24})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf \(S_n\) denotes the sum of the first \(n\) natural numbers, which of the following statements is always true for every natural number \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n-S_{n-1}=84), what will be (S_{n-1})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n+S_{n-1}=1561) and (S_n-S_{n-1}=40), which is the value of (S_n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf \(S_n\) is the sum of the first \(n\) natural numbers, which recurrence relation is always correct for \(n\ge2\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n-S_{30}=1110), what is the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhich of the following statements about the sum of the first n natural numbers is correct?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf (S_n+S_{n-1}=400) and (S_n-S_{n-1}=20), what is (S_n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf \(S_n=1+2+3+\cdots+n\) is the sum of the first \(n\) natural numbers, which relation between \(S_{2n}\) and \(S_n\) is always true?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsLet \(S_n\) denote the sum of the first n natural numbers. What is \(S_{n+1}-S_n\) when the next natural number is included in the sum?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 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 MathematicsIn a saving plan, 1 rupee is saved in the 1st week and 49 rupees in the 49th week. If the amount increases by 1 rupee each week, what is the total saving?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Easy MathematicsWhich sum is formed when 38 and 39 are added to 1 + 2 + 3 + ⋯ + 37?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Easy MathematicsWhat will be the value of S₂₄ + S₂₆?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsIf the sum of the first n natural numbers is 561, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsIf (S_n=3160), what will be the value of (S_n-S_{n-5})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Medium