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Sum Of First N Natural Numbers

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

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 MathematicsIf (S_a=3003) and (S_b=5050), what will be the value of (b-a)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Expert MathematicsWhat is the sum of the natural numbers from 61 to 125?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 59Hard MathematicsIf S_y = 7381, what is the value of S_(y+2)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is 2 times the difference between S_72 and S_36?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf S_n = 9180, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is the value of S_250 − S_240?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf S_(n+2) − S_(n−2) = 286, what is the value of n?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf \(S_n-S_{n-1}=126\) and \(S_m=1953\), what is \(n-m\), where \(S_k=1+2+\cdots+k\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsIn a parking arrangement, the \(r\)th row has \(5r\) vehicles. How many vehicles are there in 42 rows?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsIf \(S_n=3240\), what is the value of \(S_{n+8}-S_n\), where \(S_k=1+2+\cdots+k\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsWhat is the sum of \(121+122+123+\cdots+160\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsIf \(S_n-S_{n-6}=621\), where \(S_k=1+2+\cdots+k\), what is the value of \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsIf \(S_u=1431\) and \(S_v=3321\), what is the value of \(u+v\), where \(S_k=1+2+\cdots+k\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsThe value of \(S_n-S_{n-1}+S_{n-4}-S_{n-5}\) is 150. What is \(n\), where \(S_k=1+2+\cdots+k\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsOn a stage, the rth row has 4r lamps. How many lamps will there be in 35 rows?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsWhat is the value of \(S_{100}-2S_{50}\), where \(S_n=1+2+\cdots+n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsFor which value of \(n\) will \(S_n-S_{n-4}=282\), where \(S_n=1+2+\cdots+n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Medium MathematicsWhat is 3 times the difference between S_48 and S_24?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 61Medium