Number Series Tricks For IBPS PO Examination | How To Solve Number Series
Questions on number series are common in most of the competitive Exams. General these questions are based on numerical sequences that follow some logical rules based on arithmetic concepts.
One specific series is given based on that analyse the pattern of the series. Then find the next number in sequence based on the same rule.
Generally, there are 3 types of questions asked from the number series:
- A number series is given in which a number is wrongly placed. You find the wrong number
Eg:) 216 163 120 72 24
a)216 b)163 c)72 d)24
Logic: 24*1=24
24*3=72
24*5=120
24*7=168
24*9=216
Answer: b
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- A numerical series is given Which a number is missing. You find out the missing number.
Eg:) 31, 37, 41, 43, 47, 51, 53
a) 53 b) 51 c) 47 d) 43
Answer:) b
- A complete numerical series followed by incomplete numerical series. You need to solve the incomplete series in the same pattern in which the given complete numerical series.
Eg:) 9 11 13 15 17
2 4 6 8 ?
Answer:) 10
Logic : 9*1+2=11
11*1+2=13
13*1+2=15
Same way: 2*1+2=4
4*1+2=6
6*1+2=8
8*1+2=10
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Different Type Of Number Series Important Rules
- ) Series consist of perfect square
eg:) 2 6 15 31 56 (?)
a) 85 b)89 c)92 d) 81
Logic: difference between the two numbers is perfect square. this is the example of missing number series
6-2=4=2*2
15-6=9=3*3
31-15=4*4
Answer 😉 option (c)
- ) Series consist of cube addition and subtraction
179, 180, 172, 199, 135 (?)
- a) 236 b) 272 c) 240 d) 256 e) 260
Logic: 180-179= +(1*1*1)
180-172= -(2*2*2)
199-172= +(3*3*3)
Answer:) Option (e)
3.) Series consist of Perfect cube
1 9 36 100 (?)
a) 265 b)250 c)245 d)225
Logic: 9-1=(2*2*2)
36-9=(3*3*3)
100-36=(4*4*4)
225=(225-100)=125=(5*5*5)
Answer: Option (d)
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4.) Alternate series
11 1 13 3 17 ?
a) 6 b)5 c)7 d)9
logic: alternate number with prime numbers
Series of alternate prime numbers:
1 3 5 7
11 13 17 19
Answer:) option (b)
5.) Addition number series
1 5 9 13 ( ? )
a)18 b)21 c) 25 d)17
Logic : difference between the numbers is “+4”
Answer:) Option (d)
6.) Subtraction number series
100 90 80 70 ( ? )
a)60 b)30 c)40 d)50
Logic: difference between the series is “-10”
Answer :)option (a)
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7.) Multiple number series
1 2 8 64 (?)
A)1124 b)1024 c)1056 d)1058
Logic: 1*2=2
2*4=8
8*8=64
64*16=1024
Answer:) b
8.) Division number series
100 50 25 12.5 (?)
Logic: 100/2=50
50/2= 25
25/2=12.5
12.5/2=6.25
9.)Geometric number series
5 45 405 (?)
A)33805 b)3564 c)33758 d)33804
Logic: each number multiple by “9”
5*9=45
45*9=405
405*9=3645
3645*9=33805
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10.) Series consisting of primary numbers
22 33 46 63 (?)
A)84 b)82 c)86 d) 89
Logic: adding prime numbers
22+11=33
33+13=46
46+17=63
63+19=82
Answer:) Option(b)
11.) Mixed Series
1 4 10 22 (?)
A)44 b)45 c)46 d)47
Logic: *2+2
1*2+2=4
4*2+2=10
10*2+2=22
22*2+2=46
Answer;) Option(c)
This section is the easiest topic in the exam and any candidate easily gain the marks in the exam. Practise different type of questions and you can get easily 5 mask.we think this blog helps you to solve the number series Questions quickly. All the best for your exam.
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