**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 12**

**12. Find the sum of the first 40 positive integers divisible by 6.**

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by Jashan

**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 12**

**12. Find the sum of the first 40 positive integers divisible by 6.**

by Jashan

**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 11**

**11. If the sum of the first n terms of an AP is , what is the first term (that is S1)? What is the sum of first two terms? What is the second term? Similarly, find the 3rd, the 10th and the nth terms.**

by Jashan

**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 10**

**10. Show that form an AP where is defined as below:**

**(i) (ii) **

Also. find the sum of the first 15 terms in each case.

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**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 9**

**9. If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289, find the sum of first n terms.**

by Jashan

**CBSE NCERT Solutions Chapter 5 Arithmetic Progressions Exercise 5.3 Question 8**

**8. Find the sum of first 51 terms of an AP whose second and third terms are 14 and 18 respectively.**

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