The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
5
10
12
14
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1
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The nth term of an A.P., the sum of whose n terms is Sn, is
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2
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The sum of first five multiples of 3 is:
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3
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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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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What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?
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6
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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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7
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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8
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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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9
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For an A.P. if a25 - a20 = 45, then d equals to:
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10
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A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost?
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