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Sum of n terms in AP - Absolute-Beginner Level: core concept mastery Sum of n terms in AP ABSOLUTE BEGINNER

This skill primer 🌟 worksheet focuses on Sum of n terms in AP - a key topic in Arithmetic Problems. You'll solve 20 absolute-beginner-level problems (Worksheet 1 of 10). The primary focus is on core concept mastery. Master sum of n terms in ap problems, sum of n terms in ap reasoning questions, and sum of n terms in ap practice through systematic practice.

📝 Worksheet 1 of 10 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Absolute Beginner level

What you'll learn in this worksheet:
Your progress through Sum of n terms in AP
Worksheet 1 of 10 (0% complete)

Question 1

Find the sum of first 13 terms of the AP: First term=9, common difference=2.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*9+(12)*2] = 273.0

Question 2

Find the sum of first 13 terms of the AP: First term=7, common difference=8.
S_n = n/2 [2a + (n-1)d] = 13/2*[2*7+(12)*8] = 715.0

Question 3

Find the sum of first 18 terms of the AP: First term=4, common difference=7.
S_n = n/2 [2a + (n-1)d] = 18/2*[2*4+(17)*7] = 1143.0

Question 4

Find the sum of first 15 terms of the AP: First term=3, common difference=7.
S_n = n/2 [2a + (n-1)d] = 15/2*[2*3+(14)*7] = 780.0

Question 5

Find the sum of first 10 terms of the AP: First term=3, common difference=3.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*3+(9)*3] = 165.0

Question 6

Find the sum of first 12 terms of the AP: First term=5, common difference=2.
S_n = n/2 [2a + (n-1)d] = 12/2*[2*5+(11)*2] = 192.0

Question 7

Find the sum of first 16 terms of the AP: First term=10, common difference=4.
S_n = n/2 [2a + (n-1)d] = 16/2*[2*10+(15)*4] = 640.0

Question 8

Find the sum of first 10 terms of the AP: First term=4, common difference=5.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*4+(9)*5] = 265.0

Question 9

Find the sum of first 10 terms of the AP: First term=8, common difference=7.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*8+(9)*7] = 395.0

Question 10

Find the sum of first 19 terms of the AP: First term=12, common difference=7.
S_n = n/2 [2a + (n-1)d] = 19/2*[2*12+(18)*7] = 1425.0

Question 11

Find the sum of first 7 terms of the AP: First term=8, common difference=2.
S_n = n/2 [2a + (n-1)d] = 7/2*[2*8+(6)*2] = 98.0

Question 12

Find the sum of first 16 terms of the AP: First term=6, common difference=5.
S_n = n/2 [2a + (n-1)d] = 16/2*[2*6+(15)*5] = 696.0

Question 13

Find the sum of first 10 terms of the AP: First term=2, common difference=6.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*2+(9)*6] = 290.0

Question 14

Find the sum of first 8 terms of the AP: First term=11, common difference=7.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*11+(7)*7] = 284.0

Question 15

Find the sum of first 10 terms of the AP: First term=12, common difference=4.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*12+(9)*4] = 300.0

Question 16

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 17

Find the sum of first 11 terms of the AP: First term=9, common difference=5.
S_n = n/2 [2a + (n-1)d] = 11/2*[2*9+(10)*5] = 374.0

Question 18

Find the sum of first 18 terms of the AP: First term=7, common difference=6.
S_n = n/2 [2a + (n-1)d] = 18/2*[2*7+(17)*6] = 1044.0

Question 19

Find the sum of first 10 terms of the AP: First term=2, common difference=5.
S_n = n/2 [2a + (n-1)d] = 10/2*[2*2+(9)*5] = 245.0

Question 20

Find the sum of first 8 terms of the AP: First term=11, common difference=6.
S_n = n/2 [2a + (n-1)d] = 8/2*[2*11+(7)*6] = 256.0
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