If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
3
4
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1
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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2
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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3
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The sum of first five multiples of 3 is:
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4
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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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5
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In an A.P., if d = -4, n = 7, an = 4, then a is
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6
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How many 2-digit positive integers are divisible by 4 or 9?
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7
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For A.P. T18 - T8 = ........ ?
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8
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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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9
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In an A.P., if d = -4, n = 7, an = 4, then a is
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10
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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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