Students find number
sequencing questions difficult,
but in reality they are not, it is a
matter of proper preparation.
Practice
with selective questions that cover the full range
of number series
problems in competitive exams.
101. Find the missing number
Answer The pattern is:20+2x8=36
36+3x8=60
60+4x8=92
92+5x8=132
132 +6x8=180
102. Find the missing number
Answer The pattern is:259-7x8=203
203-6x8=155
155-5x8=115
115-4x8=83
83-3x8=59
103. Find the missing number
Answer The pattern is:The pattern is
5+1²=6
6+3²=15
15+5²=40
40+7²=89
89+9²=170
104. Find the missing number
Answer The pattern is:In this series 5 is added to the previus number.
The random number 60 is inserted as every
third number.Correct answer is 60
105. Find the missing number
Answer The pattern is:This is an alternating multiplication and
subtraction series.
First we multiple by 2 and then subtract 8.Correct answer is 28
106. Find the missing number
Answer The pattern is:This is alternating series with two
intependent series.First is The perfect squares of 2 ,3,4,5
Second is the perfect cubes of 2, 3,4, 5 Correct answer is 125
107. Find the missing number
Answer The pattern is:This is alternating series with two
intependent series.
First is the perfect cubes of 10, 8, 6, 4
Second is the perfect squares of 20, 18, 16, 14
Correct answer is 64
108. Find the missing number
Answer The pattern is:This is an alternating subtraction series with
repetition. There are two different patterns
here. In the first, a number repeats itself; then 3
is added to that number to arrive at the next
number, which also repeats. This gives the
series 15, 15, 18, 18, 21, 21 and so on. Every
third number follows a second pattern, in
which 3 is subtracted from each number to
arrive at the next: 24, 21, 18 Correct answer is 21,21
109. Find the missing number
Answer The pattern is:This is a two stage AP alternating addition and
subraction series.
The pattern is
80+15=95 +15
95-30=65 -30
65+45=110 +45
110-60=50 -60
50+75=125 +75
110. Find the missing number
Answer The pattern is:This is a two stage GP series.
The differences of the terms are:
624-384=240 384-264=120 264-204=60
204-170=30
The differences form the series
240, 120, 60, 30, ?
This is a GP The next number is 15
Therefore the missing number in the given
series is
174-15=159
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