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 1

10 rows are in the flowerbed

Answer 2

Hey

Here is your answer,

First row= 23
Second row =21
Last row = 5
So as series is in the following way
23,21,.........................,5
a=23 D= -2 an= 5
an = a+(n-1)d. an = 23+(n - 1)-2
5-23 =(n-1)-2
-18 =(n-1)-2
-18/-2 =n-1
9 =n-1
9+1 =n
N =10

Hope it helps you!