1. Insert the missing number. 12, 25, 49, 99, 197, 395, (...) A. 789 B. 1579 C. 722 D. 812

Here is the answer and explanation

Explanation :

Each number is twice the previous one with 1 added or subtracted alternatively.

 2.Insert the missing number. 34, 7, 37, 14, 40, 28, 43, (...) A. 31 B. 42 C. 46 D. 56

Here is the answer and explanation

Explanation :

We have two series here

34, 37, 40, 43, ... (Increase by 3)
7, 14, 28, ... (Multiply by 2)

Hence, next term is 28 × 2 = 56

 3. Find the missing number. 1, 4, 9, 16, 25, 36, 49, (....) A. 64 B. 54 C. 56 D. 81

Here is the answer and explanation

Explanation :

The series is 12, 22, 32, 42, 52, 62, 72, ...

Hence, next term = 82 = 64

 4. Insert the missing number. 2, 7, 10, 22, 18, 37, 26 A. 42 B. 52 C. 46 D. 62

Here is the answer and explanation

Explanation :

There are two series here

2, 10, 18, 26, ... (Increase by 8)
7, 22, 37, ... (Increase by 15)

Hence, next term is 37+15 = 52

 5.     4, 12, 48, 240, 1440, (...) A. 7620 B. 10080 C. 6200 D. 10020

Here is the answer and explanation

Explanation :

Go on multiplying the given numbers by 3, 4, 5, 6, 7

 6.    2, 3, 6, 0, 10, -3, 14, (...) A. 6 B. 2 C. -2 D. -6

Here is the answer and explanation

Explanation :

There are two series

2, 6, 10, 14, ... (Adding 4)
3, 0, -3, ... (Subtracting 3)

Hence, next term is -3 - 3 = -6

 7.    5, 10, 13, 26, 29, 58, 61, (....) A. 128 B. 64 C. 125 D. 122

Here is the answer and explanation

Explanation :

Numbers are alternatively multiplied by 2 and increased by 3

5 × 2 = 10
10 + 3 = 13
13 × 2 = 26
26 + 3 = 29
29 × 2 = 58
58 + 3 = 61
61 × 2 = 122

 8.    1, 8, 27, 64, 125, 216, (....) A. 354 B. 392 C. 343 D. 245

Here is the answer and explanation

Explanation :

The pattern is 13, 23, 33, 43, 53, 63, etc

Hence, next number is 73 = 343

 9.    4, 5, 7, 11, 19, (...) A. 22 B. 35 C. 27 D. 32

Here is the answer and explanation

Explanation :

4
4 × 2 - 3 = 5
5 × 2 - 3 = 7
7 × 2 - 3 = 11
11 × 2 - 3 = 19
19 × 2 - 3 = 35

 10.    23, 29, 31, 37, 41, 43, (...) A. 53 B. 47 C. 48 D. 59

Here is the answer and explanation

Explanation :

All are prime numbers in their order, starting from 23

Hence, next number is 47

 11.    8, 24, 12, 36, 18, 54, (....) A. 27 B. 68 C. 108 D. 72

Here is the answer and explanation

Explanation :

8 × 3 = 24
24 ÷ 2 = 12
12 × 3 = 36
36 ÷ 2 = 18
18 × 3 = 54
54 ÷ 2 = 27

 12.    7, 26, 63, 124, 215, 342, (....) A. 481 B. 391 C. 511 D. 421

Here is the answer and explanation

Explanation :

The series is (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1), ...

Hence, next number is (83 - 1) = 511

 13.    2, -6, 18, -54, 162, (...) A. 486 B. -486 C. 422 D. -428

Here is the answer and explanation

Explanation :

2 × -3 = -6
-6 × -3 = 18
18 × -3 = -54
-54 × -3 = 162
162 × -3 = -486

 14.    2, 6, 12, 20, 30, 42, 56, (...) A. 61 B. 72 C. 64 D. 70

Here is the answer and explanation

Explanation :

The pattern is 1×2, 2×3, 3×4, 4×5, 5×6, 6×7, 7×8.

Hence, next number is 8×9 = 72

 15.    8, 12, 18, 27, 40.5, (...) A. 60.75 B. 62 C. 58 D. 60.5

Here is the answer and explanation

Explanation :

8
(8×3)÷ 2 = 12
(12×3)÷ 2 = 18
(18×3)÷ 2 = 27
(27×3)÷ 2 = 40.5
(40.5×3)÷ 2 = 60.75

 16.    196, 144, 100, 64, 36, ? A. 16 B. 8 C. 18 D. 12

Here is the answer and explanation

Explanation :

The patter is 142, 122, 102, 82, 62, ...

So next number is 42 = 16

 17.    2, 3, 5, 16, 231, ? A. 62005 B. 52120 C. 422 D. 53105

Here is the answer and explanation

Explanation :

2
3
32 - 22 = 5
52 - 32 = 16
162 - 52 = 231
2312 - 162 = 53105

 18.    279936, 46656, 7776, 1296, 216, ? A. 60 B. 46 C. 36 D. 66

Here is the answer and explanation

Explanation :

Go on dividing by 6 to the next number

 19.    220, 218, 214, 208, 200, 190, ? A. 166 B. 178 C. 182 D. 190

Here is the answer and explanation

Explanation :

220
220 - 2 = 218
218 - 4 = 214
214 - 6 = 208
208 - 8 = 200
200 - 10 = 190
190 - 12 = 178

 20.    12, 38, 116, 350, 1052, ? A. 1800 B. 2200 C. 2800 D. 3158

Here is the answer and explanation

Explanation :

12
12 × 3 + 2 = 38
38 × 3 + 2 = 116
116 × 3 + 2 = 350
350 × 3 + 2 = 1052
1052 × 3 + 2 = 3158

 21.    9, 35, 91, 189, 341, ? A. 502 B. 521 C. 559 D. 611

Here is the answer and explanation

Explanation :

13 + 23 = 9
23 + 33 = 35
33 + 43 = 91
43 + 53 = 189
53 + 63 = 341
63 + 73 = 559

 22.    78, 64, 48, 30, 10, (...) A. -12 B. -14 C. 2 D. 8

Here is the answer and explanation

Explanation :

78 - 14 = 64
64 - 16 = 48
48 - 18 = 30
30 - 20 = 10
10 - 22 = -12

 23.    16384, 8192, 2048, 256, 16, ? A. 1 B. 8 C. 2 D. 0.5

Here is the answer and explanation

Explanation :

Terms are continuously divided by 2,4,8,16, and so on

16384
16384 ÷ 2 = 8192
8192 ÷ 4 = 2048
2048 ÷ 8 = 256
256 ÷ 16 = 16
16 ÷ 32 = 0.5

 24.    46080, 3840, 384, 48, 8, 2, ? A. 1 B. 1⁄64 C. 1⁄8 D. None of these

Here is the answer and explanation

Explanation :

46080 ÷ 12 = 3840
3840 ÷ 10 = 384
384 ÷ 8 = 48
48 ÷ 6 = 8
8 ÷ 4 = 2
2 ÷ 2 = 1

 25.    7, 21, 63, 189, 567, ? A. 1521 B. 1609 C. 1307 D. 1701

Here is the answer and explanation

Explanation :

Multiply a term with 3 to get the next term

 26.    1, 0.5, 0.25, 0.125, 0.0625, ? A. 0.015625 B. 0.03125 C. 0.0078125 D. None of these

Here is the answer and explanation

Explanation :

Divide by 2 to get the next term

 27.    Complete the series 20, 19, 17, ...., 10, 5 A. 15 B. 16 C. 13 D. 14

Here is the answer and explanation

Explanation :

20 - 1 = 19
19 - 2 = 17
17 - 3 = 14
14 - 4 = 10
10 - 5 = 5

 28.    Which fraction will come next, $\dfrac{1}{2}, \dfrac{3}{4}, \dfrac{5}{8}, \dfrac{7}{16}, \text{?}$ A. $\dfrac{9}{32}$ B. $\dfrac{9}{30}$ C. $\dfrac{9}{28}$ D. $\dfrac{11}{32}$

Here is the answer and explanation

Explanation :

Numerators are getting increased by 2. i.e., numerators goes like 1,3,5,7,...

Hence, next numerator = 7+2 = 9

Denominators are getting multiplied by 2. i.e., denominators goes like 2,4,8,16,...

Hence, next denominator = 16×2 = 32

$\text{So, the next fraction is }\dfrac{9}{32}$

 29.    4, 10, (?), 82, 244, 730 A. 26 B. 28 C. 40 D. 48

Here is the answer and explanation

Explanation :

4 × 3 - 2 = 10
10 × 3 - 2 = 28
28 × 3 - 2 = 82
82 × 3 - 2 = 244
244 × 3 - 2 = 730

 30.    Complete the series 95, 115.5, 138, ..., 189 A. 160.5 B. 162.5 C. 164.5 D. 166.5

Here is the answer and explanation

Explanation :

95 + 20.5 = 115.5
115.5 + 22.5 = 138
138 + 24.5 = 162.5
162.5 + 26.5 = 189

Mohamed
2015-04-08 22:26:26
Missing nummber of 1, 8, 2, 7, 3, 6, 4, .......?
Dev
2015-04-09 18:33:35
5

Two series
1    2   3    4
8    7   6    5
Victory
2015-04-02 06:18:42
3 5 6 12  ----- 24 26

Missing number for this is 19. Please let me how the answer is 19
gaurav
2015-10-02 14:57:10
3 6 12 24 (alternate terms getting doubled)
5 12 19 26 (increased by 7 alternate terms)
vishal
2015-04-01 07:34:53
find next term 10,15,23,31,41,?
md
2015-04-14 08:12:28
51
chirag
2015-03-16 11:41:26
18,27,49,84,132..
a) 188
b) 193
c) 168

can nybody tel how the ans wil be 193 ???
arnav
2016-08-17 06:37:39
18+9 = 27
27+22(9+13=22) = 49
49+35(22+13) =84
84+48(35+13) = 132
132+61 (48+13) =193
saurav
2015-07-10 06:17:57
27-18=9  49-27=22  84-49=35  132-84=48  ?-132=61  ---- ?=61+132=193
22-9=13   35-22=13  48-35=13  61-48=13
sakshi sharma
2015-06-15 12:25:19
27-18=9     49-27=22     84-49=35        132-84=48
22-91=13    35-22=13     48-35=13
so, next number will be= 132+ (48+13)= 193
1234 ... 7Next Go

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