If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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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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A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost?
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What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?
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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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The common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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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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The sum of first five multiples of 3 is:
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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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