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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।

MathematicsWhich of the following sets represents numbers obtained as the sum of the first n natural numbers (triangular numbers)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIn a triangular parking arrangement, the (1)st row has (2) vehicles, the (2)nd has (4) vehicles, and the (40)th has (80) vehicles. How many vehicles are there in total?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsAt which (n) will (S_n) first become greater than (5000)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the sum of (71+72+73+\cdots+100)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsFind the value of (S_{100}-S_{90}+S_{10}).Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the sum of the first (150) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_n-S_{n-5}=390), what will be the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the value of (S_{58}+S_{59}-S_{57})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is (25%) of the sum of the first (88) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_u=1225) and (S_v=2628), what is the value of (u+v)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_n=4095), what will be the value of (n)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_{2p}=820), what is the value of (p)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsFind the value of (S_{40}+S_{60}-S_{50}).Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the sum of the first (96) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsWhat is the value of (S_{25}+S_{35}+S_{45})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsFor which (n) will the sum of the first (n) natural numbers exceed (3000) for the first time?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsSubtract the sum of the first (75) natural numbers from the sum of the first (100) natural numbers.Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsIf (S_a=1540) and (S_b=2080), what will be the value of (b-a)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsA staircase figure has (1275) blocks, and the (r)th row has (r) blocks. What is the number of rows?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard MathematicsFor which (n) will (S_n-S_{n-3}=144)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Hard