How many terms are there in 20, 25, 30 . . . . . . 140?
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1
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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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2
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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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3
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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4
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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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5
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If 7 times the seventh term of an Arithmetic Progression (AP) is equal to 11 times its eleventh term, then the 18th term of the AP will be
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6
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The nth term of an A.P., the sum of whose n terms is Sn, is
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7
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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8
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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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9
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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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10
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......
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