The 3rd and 6th term of an arithmetic progression are 13 and -5 respectively. What is the 11th term?
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If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\) then their nth terms are in the ration
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2
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What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?
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3
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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4
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A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?
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5
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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6
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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7
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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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8
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For an A.P. if a25 - a20 = 45, then d equals to:
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9
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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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10
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A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost?
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