Question Text
Question 1 :
Find the sum of first 22 terms of an AP in which d = 7 and 22nd term is 149.
Question 3 :
If the sum of the first n terms of an AP is $4n – n^2$, What is the 3rd term ?
Question 4 :
30th term of the AP: 10, 7, 4, . . . , is
Question 5 :
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A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise of 0.25 m and a tread of 0.5 m. Calculate the total volume of concrete required to build the terrace.
Question 6 :
In the following AP, find the missing term: 2, __ ,26
Question 7 :
Find the sum of first 51 terms of an AP whose second and third terms are 14 and 18 respectively.
Question 8 :
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In the above fig. 200 logs are stacked in the following manner: 20 logs in the bottom row, 19 in the next row, 18 in the row next to it and so on. In how many rows are the 200 logs placed and how many logs are in the top row?
Question 9 :
11th term of the AP: – 3, -0.5, 2, . . ., is
Question 10 :
Find the sum of the following AP: 2, 7, 12, . . ., to 10 terms.