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Test: Sum of n Terms of AP - Class 10 MCQ


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10 Questions MCQ Test Mathematics (Maths) Class 10 - Test: Sum of n Terms of AP

Test: Sum of n Terms of AP for Class 10 2024 is part of Mathematics (Maths) Class 10 preparation. The Test: Sum of n Terms of AP questions and answers have been prepared according to the Class 10 exam syllabus.The Test: Sum of n Terms of AP MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Sum of n Terms of AP below.
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Test: Sum of n Terms of AP - Question 1
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What is the sum of the first 20 whole numbers?​

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Test: Sum of n Terms of AP - Question 2
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The first and last term of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be

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Test: Sum of n Terms of AP - Question 3
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For an A.P the sum of first 30 terms is -1155,the common difference is -3and the thirtieth term is -82. What is the first term?

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l = a + (n - 1)d
Where l = -82,a = ?,d = -3,n = 30
-82 = a + 29 (- 3)
a = 5

Test: Sum of n Terms of AP - Question 4
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Find the sum of the first 15 multiples of 8.
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Test: Sum of n Terms of AP - Question 5
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How many terms of AP 54, 51, 48… are required to give a sum of 513?​
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Test: Sum of n Terms of AP - Question 6
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If the sum of n terms of an AP is 3n2+5n then which of its terms is 164?​
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Sn=3n2+5n

S1=a1=3(1)2+5(1)=8

S2=3(2)2+5(2)=22

S2=22=a1+a2

a2=22-8=14

d=a2-a1=14-8=6

nth term value is 164,then what is n?

nth term=a+(n-1)d

164=8+(n-1)6

164-8 / 6=n-1

156/6=n-1

26+1=n

n=27

So 27thterm is 164.

Test: Sum of n Terms of AP - Question 7
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For an A.P. tn = 2n+3, what is the formula for Sn?​
Detailed Solution for Test: Sum of n Terms of AP - Question 7

Given , tn = 2n+3
t1=2×1+3
t1=5
Sn=n/2(t1+tn)
=n/2 (5+2n+3)
=n/2(2n+8)
=n(n+4)

Test: Sum of n Terms of AP - Question 8
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If for an A.P.Sn = n2 + 3n What is the n th term?​
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Test: Sum of n Terms of AP - Question 9
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What is the sum of the first 25 terms of the A.P -10,-7,-4,…….?​
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Test: Sum of n Terms of AP - Question 10
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The sum of the first n terms of an A.P. is 2235.The first term is 2 and the common difference is 5. What is n = ?
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