Missing number series questions and answers, Missing Number Series Questions for SBI Clerk

Ten most important Missing number series questions and answers, Number Series Questions for SBI Clerk ,SBI PO with solution , for SSC GL , SSC CHSL , RRB NTPC and other competitive Exams  have been discussed in this post.  These types of series questions are asked in many other competitive exams like SI, CPO and various entrance exams. 

Problem #1

Missing number series questions and answers
This problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order or in any other format.

Formula :- 

Every term is the product of its two precceding terms.

1st number = 3
2nd number = 3
3rd number = ( 1st number )×( 2nd number ) = 3 × 3 = 9
4th number = ( 2nd number )×( 3rd number ) = 3 × 9 = 27
5th number = ( 3rd number )×( 4th number ) = 9 × 27 = 243
6th number = ( 5th number )×( 4th number ) = 243 × 27 = 6561
Option (4)6561 is correct option 

Problem #2

Missing number series questions and answers

This problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. This reasoning problem can be solved by two method . we shall discuss both these methods one by one.

Method #1 

35 -15 = 20 (Here difference of 1st and 2nd term is 20)

63 - 35 = 28 (Here difference of 2nd and 3rd term is 20 + 8 = 28, i.e. 8 more than previous difference)

99 -63 = 36 (Here difference of  3rd and 4th term is 28 + 8 = 36, i.e. 8 more than previous difference)

143 - 99 = 44 (Here difference of  4th and  5th term is 36 + 8 = 44, i.e. 8 more than previous difference)

? - 143 = 52 (Here difference of  5th and  6th term must be  44 + 8 = 52, i.e. 8 more than previous difference)

⇒  ? = 52 + 143 = 195  

Option (2)195 is correct option 

Method #2

All these terms are one less than perfect squares of even numbers. 

4² - 1 = 16 -1 = 15 

6² - 1 = 36 -1 = 35 

8² - 1 = 64 -1 = 63 

10² - 1 = 100 -1 = 99

12² - 1 = 144 -1 = 143

14² - 1 = 196 -1 = 195 

Option (2)195 is correct option

Problem #3

Missing number series questions and answers

This reasoning problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. The value of question mark can be found using the difference of two of its previous terms. And after analysing  the difference so obtained we can find the value of question mark.
13 - 6 = 7
27 - 13 = 14
55 - 27 = 28
111 - 55 = 56
?  - 111 = 112
⇒ ? = 112 + 111
⇒ ? = 223
Option (3)223 is correct option

Problem #4

Missing number series questions and answers

This reasoning problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. 
1st number = 8
2nd number = (1st number  × 1 ) + 1 
( 8 × 1 ) + 1 = 8 + 1 = 9
3rd number = ( 2nd number × 2 ) + 2 
( 9 × 2 ) + 2 = 18 + 2 = 20
4th number = ( 3rd number × 3 ) + 3 
( 20 × 3 ) + 3 = 60 + 3 = 63
5th number = ( 4th number × 4 ) + 4
( 63 × 4 ) + 4 = 252 + 4 = 256
6th number = ( 5th number × 5 ) + 5
( 256 × 5 ) + 5 = 1280 + 5 = 1285
Option (2)1285 is correct option

Problem #5

Missing number series questions and answers

These numbers are in binary number system. So 1st of all convert these numbers to decimal number system. 

11(binary number system) = 3 (decimal number system) . 

100(binary number system) = 4 (decimal number system) 

111(binary number system) = 5  (decimal number system) 

Similarly 

1000(binary number system) = 6 (decimal number system) 

 Option (2)1000 is correct option

Problem #6


Missing number series questions and answers
This reasoning problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. 
(9 × 1) - 2 = 9 - 2 = 7 ( 2nd Number ) 
(7 × 2) - 3 = 14 - 3 = 11 ( 3rd Number ) 
(11 × 3) - 4 = 33 - 4 = 29 ( 4th Number ) 
(29 × 4) - 5 = 116 - 5 = 111 ( 5th Number ) 
(111 × 5) - 6 = 555 - 6 = 549 ( 6th Number )  = value of question mark
Option (4)549 is correct option

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Problem #7


Missing number series questions and answers
This reasoning problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. 
57 - 56 = 1= 1²
56- 55 = 1 = 1³
55 - 51 = 4 = 2²
51 - 43 = 8 = 2³
43 - 34 = 9 = 3²
Similarly ? - 34 = 4² = 16
? - 34 = 16
? = 16 + 34
? = 50
Option (2)50 is correct option

Problem #8


Missing number series questions and answers


This reasoning problem is a series problem where we have to find the value of question mark using all its previous terms means by analysing the trend of all its terms whether they are in increasing order or decreasing order. The value of question mark can be found using the difference of two of its previous terms. And after analysing  the difference so obtained we can find the value of question mark.
336 - 224 = 112
224 - 168 = 56
168  - 140 = 28
140 - 126 = 14
Similarly continuing in the same pattern 
126 - ? = 7 
⇒-? = 7 - 126
⇒? = -7  + 126
⇒? = 119
Option (3)119 is correct option

Problem #9

Missing number series questions and answers

Sum of both the digits of 30 ⇒ 3 + 0 = 3
Sum of both the digits of  27 ⇒ 2 + 7 = 9
Sum of both the digits of 36 ⇒ 3 + 6 = 9
Sum of both the digits of  45 ⇒ 4 + 5 = 9
Sum of both the digits of  72 ⇒ 7 + 2 = 9
All the numbers except 30 have have it's digits sum equal to 9. Only the number 30 have it's digits sum equal to 3 . So 30 is the odd number and it must be out. 
Option (2)30 is correct option

 Problem #10


Missing number series questions and answers

Separating these given numbers to two series by picking odd number and even number position
1st series 
5 , 7 , 10 , 14 , 
Difference 2 , 3 , 4 , 5
2nd series
6 , 8 , 11 , ? 
Difference 2, 3, 4
Hence ? = 15
Option (3)15 is correct option
Ten most important Missing number series questions and answers, Number Series Questions for SBI Clerk ,SBI PO with solution  for SSC GL , SSC CHSL , RRB NTPC and other competitive Exams were discussed in this post.  comment your valuable suggestions regarding this post and for further improvement.
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