If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
1/41
1/45
1/49
1/37
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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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2
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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3
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Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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4
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What is the sum of the following series? -64, -66, -68, ......, -100
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5
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For an A.P. if a25 - a20 = 45, then d equals to:
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6
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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7
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How many 2-digit positive integers are divisible by 4 or 9?
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8
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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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9
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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10
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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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