15th term of A.P., x  7, x  2, x + 3, ........ is
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1
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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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2
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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3
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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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4
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If 18, a, b  3 are in A.P. then a + b =
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5
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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6
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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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7
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If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio
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8
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The 2nd and 8th term of an arithmetic progression are 17 and 1 respectively. What is the 14th term?
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9
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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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10
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What is the sum of the first 12 terms of an arithmetic progression if the 3^{rd} term is 13 and the 6^{th} term is 4?
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