Reasoning - Number Letter Series Test

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Find what is the next letter. Please try to find. O,T,T,F,F,S,S,E,N,_ What is that letter?

Typist : Typewriter : : Writer: ?

0 1 9 36 99 225 441

If the second term of a geometric progression is 2 and the sum of the series to infinityis 8, then the first term is

3 2 3 6 12 37.5 115.5

4, 9, 20, 43, 90,               .

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

2  4  8  14  22  ?

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

2 3 5 8 14 23 41 69.

1 3 9 31 128 651 3913

The sum of the series: 1² + 2² + 3² + 4² + ……+ 15² is

Boxes numbered 1, 2, 3, 4 and 5 are kept in a row, and they which are to be filled with either a red or ablue ball, such that no two adjacent boxes can be filled with blue balls. Then how many different arrangements are possible, given that all balls of a given colour are exactly identical in all respects?

1W  2V  3U  5T  ?  13R

160 80 120 180 1050 4725 25987.5

42 3.5 73 26.25 118.125

HV  GT FR EP DN    ?

2  3  4  6  8  ?  16  24

P3C, R5F, T8I, V12L, ?

80, 75, 65, 50,               .

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

Complete the following series.1, 1, 4, 12, 27, 51,     .

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.

36 216 64.8 388.8 A 699.84 209.952 A÷36 ?

I  M  Q ?

D  F  I  M  R  ?

5, 9, 15, 19,                .

Three numbers are in G.P. Their sum is 28 and product is 512. The numbers are

0, 11, 26, 45,               .

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

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