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
The 10th term of an A.P is 52 and 16th terms is 82. Then the 32nd term is
162
165
173
None of these
The income of a person is 3,00,000 in the first year and he receives an increase of Rs. 10,000 to his income per year for the next 19 years. Then the total amount, he received in 20 years is
80,00,000
79,00,000
78,00,000
69,00,000
If the nth term of an AP is 6n - 1. Then its (n + 1)th term is __________
6n + 4
6n + 5
6n - 4
6n - 5
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
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
If the sum of n terms of an A.P is (Pn + qn2) where p and q are constants. Then the common difference is
2 + q
2q
2/q
2 - q
How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?
10
11
9
8
Given an = (n+1)2/n then a7 is
64
67
49/8
64/7
How many terms of the G.P 3, 32, 33,...... are needed to give the sum 120?
4
5
6
18
