The sum to the first 25 terms of the series 1 + 2 + 3......... is
305
325
315
335
If G is geometric mean of numbers a and b then G =
√ab
±√ab
ab
a/b
1 + 2 + 3 +........30 =
465
930
900
500
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
Which terms of the G.P 2, 2√2, 4,........ is 128?
12
13
14
15
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
How many terms of the G.P 3, 32, 33,...... are needed to give the sum 120?
4
5
6
18
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
The number of terms of the A.P 3, 7, 11, 15--- to be take so that the sum is 406
10
Which term of the G.P, 2, 8, 32.......... up to n term is 131072?
8th term
9th term
7th term
6thterm
