Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then
a = 7/4, r = 3/7
a = 2, r = 3/8
a = 3, r = 1/4
a = 3/2, r = ½
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If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\) then their nth terms are in the ration
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2
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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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3
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If 18, a, b  3 are in A.P. then a + b =
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4
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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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5
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What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is 1 and the 8th term is 19?
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6
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The 3^{rd} and 7^{th} term of an arithmetic progression are 9 and 11 respectively. What is the 15^{th} term?
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7
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The 2^{nd} and 8^{th} term of an arithmetic progression are 17 and 1 respectively. What is the 14^{th} term?
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8
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The 7th and 21st terms of an AP are 6 and 22 respectively. Find the 26th term
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9
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What is the sum of the following series? 64, 66, 68, ......, 100
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10
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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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