Certain number of girls made a plan for one day trip. Their budget to spend on snacks was Rs. 192. But, one of them did not turn up for the trip. Because of this, the remaining girls had to contribute Rs. 8 each in extra. Find out the number of girls who went for the trip.

1, 1, 2, 6, 24,?, 720

2, 12, 30, 56, ?, 132, 182

625, 5, 125, 25, 25, ?, 5

P3C, R5F, T8I, V12L, ?

A,G,L,P,S …?

If the nth term of an A.P. is 4n + 1, then the common difference is

1, 1,  3/4  ,1/2,5/16,.........................,

0, 11, 26, 45,               .

80, 75, 65, 50,               .