Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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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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2
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How many terms are there in 20, 25, 30 . . . . . . 140?
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3
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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4
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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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5
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The sum of first n odd natural numbers in
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6
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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7
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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8
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What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?
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9
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In an A.P., if d = -4, n = 7, an = 4, then a is
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10
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For A.P. T18 - T8 = ........ ?
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