Given an = (n+1)2/n then a7 is
64
67
49/8
64/7
1 + 2 + 3 +........30 =
465
930
900
500
How many terms of the G.P 3, 3/2, 3/4......... are needed to give the sum 3069/512?
10
11
9
8
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 upto n terms is
(10n -1) - n
9/10 (10n - 1) - n
10/9 (10n - 1) - n
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
In a group of 500 people 250 can speak Hindi & 300 speak English how many like both the language?
22
50
25
5
The number of terms of the A.P 3, 7, 11, 15--- to be take so that the sum is 406
12
14
How many terms of the G.P 3, 32, 33,...... are needed to give the sum 120?
4
6
18
The nth term of G.P 5, 25, 125 is
5n
5n-1
5n+1
n5
