Question Answers

Show that the sum of an AP whose first term is a, the second term b and the last term c, is equal to (a+c)(b+c−2a)/2(b−a) is equal to (a+c)(b+c−2a)/2(b−a) Show that the sum of an AP whose first term is a the second term b and the last term c November 23, 2020 Category: Chapter [...]

The ratio of the 11th term to the 18th term of an AP is 2 : 3. Find the ratio of the 5th term to the 21st term, and also the ratio of the sum of the first five terms to the sum of the first 21 terms. and also the ratio of the sum [...]

Find the sum of the integers between 100 and 200 that are (i) divisible by 9 (ii) not divisible by 9 Find the sum of the integers between 100 and 200 that are (i) divisible by 9 (ii) not divisible by 9 November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT [...]

An AP consists of 37 terms. The sum of the three middle most terms is 225 and the sum of the last three is 429. Find the AP. An AP consists of 37 terms. The sum of the three middle most terms is 225 and the sum of the last three is 429. Find the [...]

The eighth term of an AP is half its second term and the eleventh term exceeds one third of its fourth term by 1. Find the 15th term. The eighth term of an AP is half its second term and the eleventh term exceeds one third of its fourth term by 1. Find the 15th [...]

Find the (iii) sum of those integers from 1 to 500 which are multiples of 2 or 5. Find the (iii) sum of those integers from 1 to 500 which are multiples of 2 or 5. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT Class 10 ,

Find the (ii) sum of those integers from 1 to 500 which are multiples of 2 as well as of 5. Find the (ii) sum of those integers from 1 to 500 which are multiples of 2 as well as of 5. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT [...]

Find the (i) Sum of those integers between 1 and 500 which are multiples of 2 as well as of 5. Find the (i) Sum of those integers between 1 and 500 which are multiples of 2 as well as of 5. November 23, 2020 Category: Chapter 5 - Arithmetic Progressions , Maths , NCERT [...]

The sum of the first five terms of an AP and the sum of the first seven terms of the same AP is 167. If the sum of the first ten terms of this AP is 235, find the sum of its first twenty terms. find the sum of its first twenty terms. The sum [...]

Yasmeen saves ₹ 32 during the first month, ₹ 36 in the second month and ₹ 40 in the third month. If she continues to save in this manner, in how many months will she save Rs 2000? in how many months will she save Rs 2000? Yasmeen saves ₹ 32 during the first month [...]