Find the 15th term of the sequence 20, 15, 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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2
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The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the sequence are:
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If sum of n terms of an A.P. is 3n2 + 5n and Tm = 164 then m =
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4
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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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5
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If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio
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6
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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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7
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For an A.P. if a25 - a20 = 45, then d equals to:
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8
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If three numbers be in G.P., then their logarithms will be in
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9
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If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
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10
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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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