The sum of first five multiples of 3 is:
90
72
55
45
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1
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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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2
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If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :
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3
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The nth term of an A.P., the sum of whose n terms is Sn, is
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4
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In an A.P., if d = 4, n = 7, an = 4, then a is
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5
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If 7 times the seventh term of an Arithmetic Progression (AP) is equal to 11 times its eleventh term, then the 18th term of the AP will be
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6
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If three numbers be in G.P., then their logarithms will be in
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7
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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 = ?
Solution 
8
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The 3rd and 8th term of an arithmetic progression are 13 and 2 respectively. What is the 14th term?
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9
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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10
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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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