If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
1/41
1/45
1/49
1/37
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1
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For A.P. T18 - T8 = ........ ?
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2
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The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the sequence are:
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3
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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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4
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How many 2-digit positive integers are divisible by 4 or 9?
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5
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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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6
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The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, the number of terms is
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7
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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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8
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If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
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9
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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10
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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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