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Solved Examples(Set 1) - Series - Find Missing Number

1. Insert the missing number. $12,25,49,99,197,395,\_$
A. $789$B. $812$
C. $1579$D. $722$
Discuss
answer with explanation

Answer: Option A

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. $42$B. $56$
C. $31$D. $46$
Discuss
answer with explanation

Answer: Option B

Explanation:

We have two series here.

$34,37,40,43,\cdots \text{(increase by 3)}\\7,14,28,\cdots \text{(multiply by 2)}$

Hence, next term is $28×2=56$

3. Find the missing number. $1,4,9,16,25,36,49,\_$
A. $64$B. $81$
C. $54$D. $56$
Discuss
answer with explanation

Answer: Option A

Explanation:

The series is $1^2,2^2,3^2,4^2,5^2,6^2,7^2,\cdots$

Hence, next term $=8^2=64$

4. Insert the missing number. $2,7,10,22,18,37,26,\_$
A. $52$B. $42$
C. $62$D. $46$
Discuss
answer with explanation

Answer: Option A

Explanation:

There are two series here

$2,10,18,26,\cdots \text{(increase by 8)}\\7,22,37,\cdots \text{(increase by 15)}$

Hence, next term $=37+15=52$

5. Find the missing number. $4,12,48,240,1440,\_$
A. $10020$B. $10080$
C. $7620$D. $6200$
Discuss
answer with explanation

Answer: Option B

Explanation:

$4×3=12\\12×4=48\\48×5=240\\240×6=1440\\1440×7=10080$

Comments(64)

profile Mohamed
2015-04-08 22:26:26 
Missing nummber of 1, 8, 2, 7, 3, 6, 4, .......?
like 1 dislike 0 reply
profileDev
2015-04-09 18:33:35 
5

Two series
1    2   3    4   
   8    7   6    5
like 0 dislike 0
profileVictory
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
like 0 dislike 0 reply
profilegaurav
2015-10-02 14:57:10 
3 6 12 24 (alternate terms getting doubled)
5 12 19 26 (increased by 7 alternate terms)
like 0 dislike 0
profilevishal
2015-04-01 07:34:53 
find next term 10,15,23,31,41,?
like 0 dislike 0 reply
profilemd
2015-04-14 08:12:28 
51
like 0 dislike 0
profilechirag
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 ???
like 0 dislike 0 reply
profilearnav
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
like 1 dislike 0
profilesaurav
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
like 0 dislike 0
profilesakshi 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
like 0 dislike 0
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