If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
1/41
1/45
1/49
1/37
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1
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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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2
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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3
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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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4
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If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
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5
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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6
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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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7
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......
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8
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The common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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9
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The sum of first five multiples of 3 is:
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10
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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