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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A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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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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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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5
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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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6
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The sum of first five multiples of 3 is:
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7
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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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8
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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9
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The sum of first five multiples of 3 is:
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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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