If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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The two geometric means between the number 1 and 64 are
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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The 7th and 12th term of an arithmetic progression are 15 and 5 respectively. What is the 16th term?
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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 S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)
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The sum of first five multiples of 3 is:
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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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