Mathematics
Sequences
अनुक्रम
In this Class 9 Mathematics topic from Sequences and Progressions, students learn how numbers or objects are arranged in a definite order and how to identify the rule connecting successive terms. They practise finding missing terms, writing a sequence from a given pattern, and expressing its general term when the relationship is clear. The topic develops pattern recognition, logical reasoning, and accuracy, while preparing students to understand progressions and solve sequence-based problems in later mathematics.
Practice questions
In (9,27,81,243,\ldots), which term is (729)?In (15,24,33,42,\ldots), which term will (105) be?In (170,158,146,134,\ldots), which term is (74)?If the first four terms of a sequence are (9,20,31,42), what can be a simple rule for (a_n)?Which (a_n) rule is correct for (16,25,34,43,\ldots)?What are the first four terms formed by (a_n=8n-5)?What will (a_6) be for the rule (a_n=3n^2+4n)?What is the (8)th term formed by (a_n=140-9n)?Which sequence is formed by (a_n=7n^2)?Which sequence shows the first four terms of (a_n=3^n+n)?What is the difference between the (12)th terms of (7,14,21,28,\ldots) and (3,10,17,24,\ldots)?How are the (9)th term of (22,30,38,\ldots) and the (9)th term of (13,21,29,\ldots) related?What is the sum of the first (9) terms of (8,16,24,\ldots)?What is the sum of the first (6) terms of (132,121,110,\ldots)?Which term is (90) in (10,18,26,34,\ldots)?What is the value of (a_8+a_9) in (11,17,23,29,\ldots)?Which of the following sequences has the property that, from the third term onward, each term equals the sum of the two immediately preceding terms?Which of the following sequences is an arithmetic progression (AP) containing both negative and positive terms?Which of the following sequences is not an arithmetic progression (AP)?In which of the following sequences is every middle term the arithmetic mean of the term immediately before it and the term immediately after it?