NCERT Example 10 - Arithmetic Progressions
Question: In a flower bed, there are 23 rose plants in the first row, 21 in the second, 19 in the third, and so on. There are 5 rose plants in the last row. How many rows are there in the flower bed?
Answer: There are 10 rows in the flower bed.
Full step-by-step NCERT solution with diagrams on Something by Zero.