If 18, a, b  3 are in A.P. then a + b =
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1
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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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2
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The 3rd and 8th term of an arithmetic progression are 13 and 2 respectively. What is the 14th term?
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3
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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4
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What is the sum of the first 12 terms of an arithmetic progression if the 3^{rd} term is 13 and the 6^{th} term is 4?
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5
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If sum of n terms of an A.P. is 3n^{2} + 5n and T^{m} = 164 then m =
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6
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The 4th and 7th term of an arithmetic progression are 11 and 4 respectively. What is the 15th term?
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7
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How many 2digit positive integers are divisible by 4 or 9?
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8
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The sum of first n odd natural numbers in
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9
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If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is
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10
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The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is
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