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question_answer1) If 19 arithmetic mean is inserted between, then the 18th arithmetic mean is.
question_answer2) The sum of n terms of the series given by is:
question_answer3) The ratio of sum of n terms of two arithmetic progressions is (7n + 1) : (4n + 27) then find the ratio of their 12th terms.
question_answer4) If the sum of first seven terms is 49 and that of first seventeen terms is 289, then the sum of first 25 terms of the sequence is ____.
question_answer5) The two sets of numbers each containing three terms is in AP; such that the sum of each set is 15. The difference between the common differences of the numbers of two sets is 1 and the ratio of the product of two sets is 7 : 8. The sets of numbers in two sets are.
question_answer6) lf are in Gp, then the value of y is:
question_answer7) The value of is given by:
question_answer8) There are 30 potted flowering plants placed in a row from the gate to the entrance of the house. If each plant is separated by a distance of 5 m from each other and the gardener has to water the plants in the morning which is at a distance of 10 m from the first plant from the entrance of the house. If he starts from the entrance, then how much distance will the gardener has to walk to water all the plants?
question_answer9) A three digit number is such that if 400 is subtracted from it, then it results in a three digit number whose digits are in AP. If the digits of the first number are in GP, then the sum of these two numbers is:
question_answer10) The three numbers a, b, c, are such that they are in HP and their square is in AP, then the ratio of a : b : c is:
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