# CASE STUDY QUESTION 47-Class X-Maths

CASE STUDY QUESTION 47-Class X-Maths

**Aditya is celebrating his birthday. He invited his friends. He bought a packet of toffees/candies which contains 120 candies. He arranges the candies such that in the first row there are 3 candies, in second there are 5 candies, in third there are 7 candies and so on.**

**(a) Find the total number of rows of candies.**

(i) 12 (ii) 10 (iii) 14 (iv) 8**Ans:** (ii) 10

**(b) How many candies are placed in last row?**

(i) 22 (ii) 21 (iii) 24 (iv) 18

**Ans:** (ii) 21

**(c) Find the difference in number of candies placed in 7th and 3rd row.**

(i) 8 (ii) 10 (iii) 12 (iv) 14

**Ans: **(i) 8

**(d) If Aditya decides to make 15 rows, then how many total candies will be placed by him with the same arrangement?**

(i) 200 (ii) 150 (iii) 255 (iv) 210

**Ans:** (iii) 255

**(e) Find the number of candies in 12 ^{th} row.**

(i) 21 (ii) 30 (iii) 25 (iv) 19

**Ans: **(iii) 25