In an A.P., if d = -4, n = 7, an = 4, then a is
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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2
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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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3
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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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4
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......
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5
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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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6
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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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7
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The sum of first five multiples of 3 is:
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8
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A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :
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9
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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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10
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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