If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is
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1
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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2
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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3
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The sum of first five multiples of 3 is:
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4
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For A.P. T18 - T8 = ........ ?
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5
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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6
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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7
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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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8
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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9
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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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10
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If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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