In an A.P., if d = 4, n = 7, an = 4, then a is
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1
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If 18, a, b  3 are in A.P. then a + b =
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2
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The nth term of an A.P., the sum of whose n terms is Sn, is
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3
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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4
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If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?
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5
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The sum of first n odd natural numbers in
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6
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What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?
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7
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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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8
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If sum of n terms of an A.P. is 3n^{2} + 5n and T^{m} = 164 then m =
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9
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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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10
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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