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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।

MathematicsWhat is the ratio of (S_{60}) to (S_{30})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (1+2+3+\cdots+n=2556), which is (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsHow much greater is the sum of the first (40) natural numbers than the sum of the first (20) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the value of (S_{49}+S_{51}-2S_{50})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_n=465), what will be the value of (S_{n+5})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the sum of natural numbers from (31) to (72)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf the sum of the first (n) natural numbers is (2016), what is the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the sum of the first (64) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard 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 MathematicsWhat is the difference between the sum from (1) to (150) and the sum from (1) to (100)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsFor which positive integers \(n\) is the sum \(S_n\) of the first \(n\) natural numbers exactly divisible by \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsHow much less is the sum of the first (99) natural numbers than the sum of the first (100) natural numbers?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 MathematicsFind the sum of natural numbers from (121) to (150).Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat is half of the sum of the first (84) natural numbers?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 MathematicsWhat is the sum of natural numbers from (25) to (75)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf a positive integer \(S\) can be written as the sum of the first \(n\) natural numbers, which of the following quantities must be an odd perfect square?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsWhat is the ratio of the sums of the first (90) and first (60) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard