Interview Aptitude Questions – Series with Answers
This blog explains about Interview Aptitude Questions – Series with Answers and is given below :
1)Which number does not belong to this series 1,1,2,3,4,5,8,13,21?
Answer : Option A
Explanation :
It is 4 and is based on adding the adjacent number in the series.
1+1=2
1+2=3
2+3=5, there you go
3+5=8
5+8= 13
8+13=21 and so on
2) What will be the next number 5,10,19,32,49,70 ….?
Answer : Option D
Explanation :
The next number will be 95.
10-5 = 5
19-10 = 9
32-19=13
49-32= 17
70-49=21
?- 70= 25
3. In a certain code language if the word ‘MUSEUM’ is coded as ‘LSPAPG’, then how
will the word ‘PALACE’ be coded in that language?
a. OYIWXY
b. OYIXYW
c. IYXYWO
d. YXWYOI
Answer : Option A
Explanation :
Word: M U S E U M
Logic: -1 -2 -3 -4 -5 -6
Code: L S P A P G
Similarly, the code for PALACE is
Word: P A L A C E
Logic: -1 -2 -3 -4 -5 -6
Code: O Y I W X Y
4. If DELHI is coded as 73541 and CALCUTTA as 82589662, how can CALICUT be coded?
a. 5279431
b. 5978213
c. 8251896
d. 8543691
Answer : Option C
Explanation:
The alphabets are coded as follows:
D E L H I C A U T
7 3 5 4 1 8 2 9 6
So, in CALICUT, C is coded as 8, A as 2, L as 5, U as 9 and T as 6. Thus, the code
for CALICUT is 8251896.
5.In a certain code language, if the value of CONTRACT = 56 and ‘GROWTH’ = 30, then
what is the value of DISTRIBUTION?
a. 130
b. 132
c. 140
d. 142
Answer : Option B
Explanation :
Number of letters in the word CONTRACT = 8 and 8 x 7 = 56.
Number of letters in the word GROWTH = 6 and 6 x 5 = 30.
Similarly, DISTRIBUTION => 12 and 12 x 11 = 132.
6. In a certain code language, if the value of ‘BLOCK’ = 13 and ‘CURTAIN’ = 27,
then what is the value of the word ‘SCIENCE’?
a. 32
b. 36
c. 38
d. 34
Answer : Option C
Explanation :
In this product of the digits in the place-values of the letters as
per the alphabet is obtained first and then added i.e, BLOCK
=> B = 2
L = 12 => 1 x 2 = 2
O = 15 => 1 x 5 = 5
C = 3
K = 11 => 1 x 1 = 1
Now (2 + 2 + 5 + 3 + 1) = 13.
So, BLOCK = 13.
Similarly, SCIENCE = 38.
7. 1.5, 3, 5.5, 9, 13.5, 19, …
a. 81
b. 15.5
c. 21.5
d. 25.5
Answer : Option D
Explanation :
The pattern is get by adding 1.5, 2.5, 3.5 …..
Then, 19+6.5 = 25.5
8. Which term of the series 5,8,11,14,…….is 320?
a. 104th
b. 105th
c. 106th
d. 64th
Answer : Option C
Explanation :
Clearly, 5+3= 8, 8+3= 11, 11+3= 14,….
So this is an A.P series in which a=5, d=3.
Let the number of the terms be n
Then, 320= 5+(n-1)*3; 3n=318; n=106
9. In the series 5, 10, 20, 40,….what will be the 10th term?
a. 1280
b. 2560
c. 1820
d. 2650
Answer : Option D
Explanation :
This is an G.P series in which a= 5; r= 2
10th term= ar(n-1) = 5*2 (10-1) = 5*2 9 = 2560
10. In a certain code language, if the value of 14 x 15 = 25 and 26 x 42 = 64, then
what is the value of 73 x 31 = ?
a. 100
b. 110
c. 90
d. 120
Answer : Option A
Explanation :
14 x 15 = 14 + 15 = 29 and 29 – 4 = 25.
26 x 42 = 26 + 42 = 68 and 68 – 4 = 64.
Similarly, 73 x 31 = (73 + 31) – 4 = 104 – 4 = 100.
Final Thoughts
Interview aptitude questions are an essential part of evaluating a candidate’s logical thinking, analytical skills, and problem-solving ability. Payilagam offers aptitude classes for each and every batch to crack their placement easily. Practicing a wide range of questions on number series and similar topics not only improves accuracy but also builds confidence for real interview and placement scenarios. Understanding how to approach each question with clarity makes the preparation process more structured and effective.
As you work through these interview aptitude questions, remember that consistency and regular practice are key. Rather than memorizing answers, focus on understanding the logic behind each question, as this will help you handle similar patterns in actual assessments. With time, your reasoning skills will become sharper, and you will be able to tackle new challenges with ease.
Whether you are preparing for campus placements, competitive exams, or job interviews, regular practice of interview aptitude questions will make you more comfortable with different question types and time management. Start early, stay consistent, and keep improving your skills to perform confidently during every stage of your interview journey.
