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Sequences And Progressions

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

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 MathematicsWhat is the difference between the sum of the first (135) natural numbers and the sum of the first (90) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is the value of (S_{36}+S_{72}-S_{18})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf \(S_n\) is the sum of the first \(n\) natural numbers, which of the following statements is always true for every positive integer \(n\)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard 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_{2k+1}=1770), what will be the value of (k)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsFind the value of (S_{140}-S_{130}+S_{10}).Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is the sum of the first (175) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard 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 MathematicsWhich number should be added to (S_{68}) to get (S_{75})?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard 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 MathematicsIf (S_{5p}=5050), what is the value of (p)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is the sum of the first (108) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsWhat is obtained by subtracting the sum of the first (125) natural numbers from the sum of the first (150) natural numbers?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard MathematicsIf (S_{m+2}-S_m=151), what is the value of (m)?Class 9Sequences and ProgressionsSum of first n natural numbersLevel 62Hard