Question Answers

Kanika was given her pocket money on Jan 1st, 2008. She puts ₹ 1 on Day 1, ₹ 2 on Day 2, ₹ 3 on Day 3, and continued doing so till the end of the month, from this money into her piggy bank. She also spent ₹ 204 of her pocket money and found [...]

The sum of the first n terms of an AP whose first term is 8 and the common difference is 20 is equal to the sum of first 2n terms of another AP whose first term is – 30 and the common difference is 8. Find n. The sum of first five multiples of 3 [...]

How many terms of the AP: -15, -13, -11,— are needed to make the sum -55? Explain the reason for double answer. — are needed to make the sum -55? Explain the reason for double answer. 11 13 How many terms of the AP: -15 November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , [...]

Find the sum of first seven numbers which are multiples of 2 as well as of 9. Find the sum of first seven numbers which are multiples of 2 as well as of 9. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,

Find the sum of last ten terms of the AP: 8,10, 12,……., 126. -12 ....... 10 126. Find the sum of last ten terms of the AP: 8 November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,

Find the sum of all the 11 terms of an AP whose middle most term is 30. Find the sum of all the 11 terms of an AP whose middle most term is 30. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,

If sum of first 6 terms of an AP is 36 and that of the first 16 terms is 256, find the sum of first 10 terms. find the sum of first 10 terms. If sum of first 6 terms of an AP is 36 and that of the first 16 terms is 256 November [...]

Find the sum of first 17 terms of an AP whose 4th and 9th terms are -15 and -30 respectively. Find the sum of first 17 terms of an AP whose 4th and 9th terms are -15 and -30 respectively. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 [...]

If Sn denotes the sum of first n terms of an AP, prove that S12 = 3(S8 – S4). If Sn denotes the sum of first n terms of an AP prove that S12 = 3(S8 – S4). November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,

In an AP, if Sn = 3n^2 + 5n and ak = 164, find the value of k. find the value of K. if Sn = 3n^2 + 5n and ak = 164 In an AP November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,