In an A.P., if d = 4, n = 7, an = 4, then a is
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If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)
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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 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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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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What is the sum of the following series? 64, 66, 68, ......, 100
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What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3?
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For an A.P. if a25  a20 = 45, then d equals to:
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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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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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