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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The 7th and 12th term of an arithmetic progression are 15 and 5 respectively. What is the 16th term?
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Find the n^{th} term of the following sequence :
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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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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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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The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \(\frac{{{l^2}  {a^2}}}{{k  \left( {l + a} \right)}}\) then k = ?
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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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If sum of n terms of an A.P. is 3n^{2} + 5n and T^{m} = 164 then m =
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The 3rd and 9th term of an arithmetic progression are 8 and 10 respectively. What is the 16th term?
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If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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