15th term of A.P., x  7, x  2, x + 3, ........ is
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1
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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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2
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After striking the floor, a rubber ball rebounds to 4/5th of the height from which it has fallen. Find the total distance that it travels before coming to rest if it has been gently dropped from a height of 120 metres.
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3
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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4
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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5
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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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6
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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7
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The 2^{nd} and 6^{th} term of an arithmetic progression are 8 and 20 respectively. What is the 20^{th} term?
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8
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If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is
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9
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What is the sum of the first 13 terms of an arithmetic progression if the first term is 10 and last term is 26?
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10
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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