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11th CBSE
IMPORTANT
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If the geometric mean of a and b is 6 and the geometric mean of b and c is 12, then the ratio of c and a is: 

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Important Questions on Sequence and Series

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11th CBSE
IMPORTANT
 If n3=11025 and, then nN, is equal to
EASY
11th CBSE
IMPORTANT
The number of positive multiples of 11 less than 3993 is
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11th CBSE
IMPORTANT
The third term of a GP is 2. The product of first 5 terms is
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11th CBSE
IMPORTANT
The sum of the first 7 terms in a series of 10 terms in an arithmetic progression is 28 while the sum of the last seven terms is 49. What is the sum of all the 10 terms? 
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11th CBSE
IMPORTANT
At Mumbai bus depot there are 1024 buses. Every hour, half the buses depart for different destinations. After how many hours, does the depot have only one bus?
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11th CBSE
IMPORTANT
100 arithmetic means are inserted between x and y. The common difference d is
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11th CBSE
IMPORTANT
The sum of 24 terms of the series 1, (1+2), (1+2+3) ... is
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11th CBSE
IMPORTANT
If l, m, n, p, q, r, s and t are in arithmetic progression, then the ratio of (r -t) and (p -n) is