For an A.P. if a25  a20 = 45, then d equals to:
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The first term of an Arithmetic Progression is 22 and the last term is 11. If the sum is 66, the number of terms in the sequence are:
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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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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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4
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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15th term of A.P., x  7, x  2, x + 3, ........ is
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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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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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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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If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :
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