How many 2digit positive integers are divisible by 4 or 9?
32
22
34
30
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1
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The nth term of an A.P., the sum of whose n terms is Sn, is
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2
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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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3
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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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4
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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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5
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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6
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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 = S_{n} – k S_{n1} + S_{n2} then k =
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7
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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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8
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What is the sum of the first 13 terms of an arithmetic progression if the first term is 10 and last term is 26?
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9
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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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10
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The 7th and 21st terms of an AP are 6 and 22 respectively. Find the 26th term
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