If 18, a, b - 3 are in A.P. then a + b =
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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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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The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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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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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n - 1 times) = ......
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In an A.P., if d = -4, n = 7, an = 4, then a is
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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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After striking the floor, a rubber ball rebounds to 4/5th of the height from which it has fallen. Find the total distance that it travels before coming to rest if it has been gently dropped from a height of 120 metres.
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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