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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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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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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3
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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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4
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If three numbers be in G.P., then their logarithms will be in
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5
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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6
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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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7
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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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8
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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9
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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10
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For an A.P. if a25 - a20 = 45, then d equals to:
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