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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What is the sum of the following series? -64, -66, -68, ......, -100
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2
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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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3
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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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4
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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5
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The common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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6
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Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then
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7
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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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8
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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9
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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10
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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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