If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
-2
-3
2
3
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1
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Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = Sn – k Sn-1 + Sn-2 then k =
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2
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If three numbers be in G.P., then their logarithms will be in
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3
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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4
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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5
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How many 2-digit positive integers are divisible by 4 or 9?
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6
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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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7
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For A.P. T18 - T8 = ........ ?
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8
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What is the sum of the following series? -64, -66, -68, ......, -100
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9
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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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10
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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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