If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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The nth term of an A.P., the sum of whose n terms is Sn, is
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3
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What is the sum of the following series? 64, 66, 68, ......, 100
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4
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If three numbers be in G.P., then their logarithms will be in
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5
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If 18, a, b  3 are in A.P. then a + b =
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The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
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7
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For A.P. T18  T8 = ........ ?
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8
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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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9
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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10
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The sum of first five multiples of 3 is:
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