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
Sum of the sequence 9, 99, 999, 9999 up to n terms is
(10n -1) - n
9/10 (10n - 1) - n
10/9 (10n - 1) - n
None of these
The number of terms of the A.P 3, 7, 11, 15--- to be take so that the sum is 406
5
10
12
14
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
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
Which terms of the G.P 2, 2√2, 4,........ is 128?
13
15
Which term of the G.P, 2, 8, 32.......... up to n term is 131072?
8th term
9th term
7th term
6thterm
If G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
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
1 + 2 + 3 +........30 =
465
930
900
500
