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 common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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2
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If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
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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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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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5
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If the sum of n terms of an A.P. be 3n2 + n and its common difference is 6, then its first term is
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6
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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7
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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8
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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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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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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