The number of terms in the A.P 7, 13, 19.......97 is
97
17
16
15
The value of 112 + 122 + .....202 is
3845
2485
2470
3255
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 up to n terms is
(10n -1) - n
9/10 (10n - 1) - n
10/9 (10n - 1) - n
None of these
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 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 G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
Given an = (n+1)2/n then a7 is
64
67
49/8
64/7
1 + 2 + 3 +........30 =
465
930
900
500
Which term of the G.P, 2, 8, 32.......... up to n term is 131072?
8th term
9th term
7th term
6thterm
