Question

The students of a school can stand in two ways, in circles or in row. In case

of circles: there are 23 students in the first circle, 21 in the second, 19 in the

third and so on. There are 5 students in the last inner most circle.

In case of rows: 20 students are there in the first row, 19 in the second row,

18 in the next row and so on. If 5 students are there in the top most row. It

was observed that students were talking with one another when they were

made to stand in the circular pattern. Therefore, the teacher chose to make

them stand in rows.



i) If the students are standing in circles then the number of students

standing in 5th circle is

a) 17 b) 16

c) 15 d) 14

ii) If the students are standing in circles then the number of circles is

a) 5 b) 10

c) 15 d)20

iii) If the students are standing in rows then the number of students

standing in 7th row is

a) 14 b)16

c) 15 d)13​

Answer 1

Answer:

i) c) 15

ii) b) 10

iii) 1) 14