Find the 15th term of the sequence 20, 15, 10 . . . . .
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Find the nth term of the following sequence :
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15th term of A.P., x  7, x  2, x + 3, ........ is
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be
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If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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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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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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The 4th and 7th term of an arithmetic progression are 11 and 4 respectively. What is the 15th term?
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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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The 3rd and 8th term of an arithmetic progression are 13 and 2 respectively. What is the 14th term?
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