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Master Sum of n terms in AP - Beginner Level Problems Sum of n terms in AP BEGINNER

Excel in competitive exams with this skill builder ⚡ worksheet on Sum of n terms in AP. Worksheet 3 of 10 contains 20 beginner-level problems. Target your step-by-step problem solving skills while practicing sum of n terms in ap practice, sum of n terms in ap for competitive exams, and how to solve sum of n terms in ap.

📝 Worksheet 3 of 10 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

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Worksheet 3 of 10 (22% complete)

Question 1

Find the sum of first 7 terms of the AP: First term=5, common difference=5.
S_n = n/2 [2a + (n-1)d] = 7/2*[2*5+(6)*5] = 140.0

Question 2

Find the sum of first 12 terms of the AP: First term=4, common difference=2.
S_n = n/2 [2a + (n-1)d] = 12/2*[2*4+(11)*2] = 180.0

Question 3

Find the sum of first 15 terms of the AP: First term=8, common difference=6.
S_n = n/2 [2a + (n-1)d] = 15/2*[2*8+(14)*6] = 750.0

Question 4

Find the sum of first 9 terms of the AP: First term=9, common difference=4.
S_n = n/2 [2a + (n-1)d] = 9/2*[2*9+(8)*4] = 225.0

Question 5

Find the sum of first 9 terms of the AP: First term=3, common difference=4.
S_n = n/2 [2a + (n-1)d] = 9/2*[2*3+(8)*4] = 171.0

Question 6

Find the sum of first 8 terms of the AP: First term=6, common difference=4.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*6+(7)*4] = 160.0

Question 7

Find the sum of first 17 terms of the AP: First term=9, common difference=4.
S_n = n/2 [2a + (n-1)d] = 17/2*[2*9+(16)*4] = 697.0

Question 8

Find the sum of first 15 terms of the AP: First term=6, common difference=5.
S_n = n/2 [2a + (n-1)d] = 15/2*[2*6+(14)*5] = 615.0

Question 9

Find the sum of first 11 terms of the AP: First term=2, common difference=8.
S_n = n/2 [2a + (n-1)d] = 11/2*[2*2+(10)*8] = 462.0

Question 10

Find the sum of first 20 terms of the AP: First term=12, common difference=4.
S_n = n/2 [2a + (n-1)d] = 20/2*[2*12+(19)*4] = 1000.0

Question 11

Find the sum of first 17 terms of the AP: First term=9, common difference=8.
S_n = n/2 [2a + (n-1)d] = 17/2*[2*9+(16)*8] = 1241.0

Question 12

Find the sum of first 14 terms of the AP: First term=5, common difference=8.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*5+(13)*8] = 798.0

Question 13

Find the sum of first 8 terms of the AP: First term=4, common difference=4.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*4+(7)*4] = 144.0

Question 14

Find the sum of first 15 terms of the AP: First term=11, common difference=2.
S_n = n/2 [2a + (n-1)d] = 15/2*[2*11+(14)*2] = 375.0

Question 15

Find the sum of first 11 terms of the AP: First term=5, common difference=6.
S_n = n/2 [2a + (n-1)d] = 11/2*[2*5+(10)*6] = 385.0

Question 16

Find the sum of first 13 terms of the AP: First term=4, common difference=3.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*4+(12)*3] = 286.0

Question 17

Find the sum of first 12 terms of the AP: First term=9, common difference=8.
S_n = n/2 [2a + (n-1)d] = 12/2*[2*9+(11)*8] = 636.0

Question 18

Find the sum of first 19 terms of the AP: First term=8, common difference=2.
S_n = n/2 [2a + (n-1)d] = 19/2*[2*8+(18)*2] = 494.0

Question 19

Find the sum of first 9 terms of the AP: First term=12, common difference=3.
S_n = n/2 [2a + (n-1)d] = 9/2*[2*12+(8)*3] = 216.0

Question 20

Find the sum of first 14 terms of the AP: First term=10, common difference=8.
S_n = n/2 [2a + (n-1)d] = 14/2*[2*10+(13)*8] = 868.0
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