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Mathematics

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

MathematicsIf the sum of the first n natural numbers is Sₙ = 25,425, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Medium MathematicsIf S_n=7140, where S_n is the sum of the first n natural numbers, what is the value of S_(n+5)−S_n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf S_n=8911, where S_n is the sum of the first n natural numbers, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Medium MathematicsWhat is 20% of the sum of the first 150 natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Medium MathematicsIf S_n+S_(n−1)=4212 and S_n−S_(n−1)=65, what is the value of S_n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Hard MathematicsIf S_n=n(n+1)/2 and S_n=6670, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 60Medium MathematicsWhat is 4 times the difference between S_96 and S_48, where S_n is the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat is the value of S_300−S_285, where S_n is the sum of the first n natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsThe sum of the first (n) natural numbers is (13695). What is the value of (n-30)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhat is the difference between the sum of the first (175) natural numbers and the sum of the first (125) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhat is the value of (S_{48}+S_{96}-S_{32})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsIf S_x=8385, where S_x is the sum of the first x natural numbers, what is the value of x?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsIn a parking arrangement, the rth row has 7r vehicles. How many vehicles will there be in 56 rows?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat is the sum of 151 + 152 + 153 + ... + 210?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard MathematicsIf S_(2k+3) = 3240, what is the value of k?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard MathematicsFind the value of (S_{180}-S_{170}+S_{20}).Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhat is the sum of the first (250) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhich number should be added to (S_{95}) to get (S_{105})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsOn a stage, the rth row has 6r lamps. How many lamps will there be in 45 rows?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Medium MathematicsWhat is the value of S_144 − 2S_72?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard