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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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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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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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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The 7th and 21st terms of an AP are 6 and 22 respectively. Find the 26th term
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How many 2digit positive integers are divisible by 4 or 9?
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The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
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How many terms are there in 20, 25, 30 . . . . . . 140?
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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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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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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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