The two geometric means between the number 1 and 64 are
8 and 16
2 and 16
4 and 8
4 and 16
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1
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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2
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Find the nth term of the following sequence :
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3
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The nth term of an A.P., the sum of whose n terms is Sn, is
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4
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In an A.P., if d = -4, n = 7, an = 4, then a is
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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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The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?
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7
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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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8
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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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9
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If three numbers be in G.P., then their logarithms will be in
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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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