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Sum Formula

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

MathematicsIf \(S_n=1+2+3+\cdots+n\), which of the following expressions is an odd perfect square for every natural number \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsWhat is the ratio of the sums of the first (100) and first (50) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsWhat is the ratio of the sums of the first (150) and first (100) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsWhat is the difference between the sums of the first (225) and first (175) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsUnder which condition is the sum of the first n natural numbers a multiple of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsFor which type of positive integer \(n\) is the sum of the first \(n\) natural numbers exactly divisible by \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Expert MathematicsLet \(S_n=1+2+3+\cdots+n\). Which expression represents the sum of the last 8 consecutive natural numbers ending at \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is the difference between the sum from (1) to (250) and the sum from (1) to (200)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is half of the sum of the first (144) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhich of the following expressions represents the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhich expression correctly represents the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is the difference between the sums of the first (180) and first (90) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is the ratio of the sums of the first (96) and first (72) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is the ratio of the sums of the first (64) and first (32) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsWhat is the difference between the sums of the first (120) and first (85) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Expert MathematicsIf S_(2k+3) = 3240, what is the value of k?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard MathematicsWhat is the value of S_144 − 2S_72?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard MathematicsWhat is the sum of the first (132) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhat is the sum of the first (92) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsIf S_n = 9180, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard