If 18, a, b - 3 are in A.P. then a + b =
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1
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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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2
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Find the nth term of the following sequence :
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3
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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4
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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5
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What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?
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6
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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7
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After striking the floor, a rubber ball rebounds to 4/5th of the height from which it has fallen. Find the total distance that it travels before coming to rest if it has been gently dropped from a height of 120 metres.
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8
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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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9
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Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = Sn – k Sn-1 + Sn-2 then k =
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10
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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