How many terms are there in the GP 5, 20, 80, 320........... 20480?
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1
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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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2
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The sum of first n odd natural numbers in
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3
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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4
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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5
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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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6
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What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is -1 and the 8th term is 19?
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7
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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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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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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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10
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If 18, a, b - 3 are in A.P. then a + b =
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