A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?
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For A.P. T18  T8 = ........ ?
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The 3^{rd} and 7^{th} term of an arithmetic progression are 9 and 11 respectively. What is the 15^{th} term?
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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1  6b}}{{2b}} \frac{{1  12b}}{{2b}}\) . . . . . is
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The 3rd and 7th term of an arithmetic progression are 9 and 11 respectively. What is the 15th term?
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The two geometric means between the number 1 and 64 are
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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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If sum of n terms of an A.P. is 3n^{2} + 5n and T^{m} = 164 then m =
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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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Find the nth term of the following sequence :
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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