How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?
10
11
9
8
If the sum of 3 numbers in A.P is 24 and their product is 440, then the numbers are
5, 8, 11
6, 9, 12
7, 10, 13
4, 8, 12
Sum of the sequence 9, 99, 999, 9999 upto n terms is
(10n -1) - n
9/10 (10n - 1) - n
10/9 (10n - 1) - n
None of these
Water flows into a tank. The volume of water in the tank at each minute form an A.P. If the initial volume was 5 litres and becomes 6 times after 6 minutes. The speed of water increase is
5 litres/min
6 litres/min
15 litres/min
2 litres/min
Given an = (n+1)2/n then a7 is
64
67
49/8
64/7
The 10th term of an A.P is 52 and 16th terms is 82. Then the 32nd term is
162
165
173
The sum to the first 25 terms of the series 1 + 2 + 3......... is
305
325
315
335
Which terms of the G.P 2, 2√2, 4,........ is 128?
12
13
14
15
The A.M between pth and qth terms of an A.P is equal to the AM between rth and sth terms of the A.P. Then p+q =
r + s
r - s/r + s
r + s/r - s
r + s + 1
If m, p, q are consecutive terms in an A.P, then P is
mq/2
m - q/2
m2+q2/2
m + q/2
