If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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What is the sum of the first 13 terms of an arithmetic progression if the first term is 10 and last term is 26?
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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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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The 2nd and 8th term of an arithmetic progression are 17 and 1 respectively. What is the 14th term?
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15th term of A.P., x  7, x  2, x + 3, ........ is
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If log 2, log (2^{x} 1) and log (2^{x} + 3) are in A.P, then x is equal to ___
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What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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