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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If the nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is
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What is the sum of the following series? 64, 66, 68, ......, 100
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, the number of terms is
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5
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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For A.P. T18  T8 = ........ ?
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The 2^{nd} and 8^{th} term of an arithmetic progression are 17 and 1 respectively. What is the 14^{th} term?
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8
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For an A.P. if a25  a20 = 45, then d equals to:
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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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A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :
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