REASONING
Completing the
Series
In these types of questions there is a sequence and a missing
number. You need to identify the sequence in order to tell the missing number.
1. 1, 2, 4, 7,
11, 16, __, 29
Hint: In this sequence the difference between two successive
numbers is increasing. Check the difference between successive terms is 1, 2, 3,
4, 5, 6, 7…. So the missing number is 22 as per the sequence.
2. 3, 8, 15, 24, 35, __, 63
3. 4, 7, 12,
19, __, 39
4. 5, 10, 20,
25, 35, 40, 50, __, 65
5. 3, 6, 9,
15, 18, 21, 27, 30, 33, ___
6. 3, 12, 27,
48, __, 108
7. 4, 7, 11,
18, 29, __ , 76
8. 2, 6, 12,
20, 30, __, 56
9. 1, -2, -2,
4, -8, -32, 256, ___, -2097152
10.12, 6, 24,
12, 48, 18, 96, 24, ___, 30
Answers:
1.
22
|
2.
48
|
3.
28
|
4.
55
|
5.
39
|
6.
75
|
7.
47
|
8.
42
|
9.
-8192
|
10.
192
|
Hints:
1. In this
sequence the difference between two successive numbers is increasing. Check the
difference between successive terms is 1, 2, 3, 4, 5, 6, 7…. So the missing
number is 22 as per the sequence
2. Pattern is x2 - 1
3. Pattern is x2
+ 3
4. Pattern is
Multiple of 5s but multiples of 3 are omitted
5. Pattern is
multiples of 3 but omit the multiples of 4
6. Pattern is
3
x2
7. Next term
is the sum of two previous terms
8. Pattern is
n(n+1)
9. Next term
is product of previous two terms
10.Identify
the alternate terms forming patterns
12, 6, 24,
12, 48, 18, 96,
24, 192, 30, 384,
36
Red terms are getting doubled
Middle ones are increasing by 6
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