How To Solve Coding And Number Series Quickly

August 11, 2023

Concept of Coding And Number Series:-

In this Page How to Solve Coding and Number Series Questions Quickly is given.

Letter-Number Coding is a mark scoring section of the reasoning questions.  In competitive examinations reasoning contain a most important part. If you achieve good marks in reasoning you will get a good score and rank in competitive examinations.

How to Solve coding and Number Series

Types of Number Series:

 

1. Perfect Square Series:

Example– 324 = 18^{2} , 361 = 19^{2}, 400 = 20^{2}, 441 = 21^{2}, 484 = 22^{2}

2. Perfect Cube Series:

Example– 8^{3}=512, 9^{3}=729, 10^{3}=1000, 11^{3}=1331

3. Geometric Series:

Example- 4\times 5=20,20 \times 5=100,100\times 5=500,500 \times 5=2500

4. Arithmetic Series:

Example- 4,8,12,16,20,24,28

The common difference is constant that is 4.

5. Two Stage type Series:

Example-1, 3, 6, 10, 15…

3 – 1 = 2, 6 – 3 = 3, 10 – 6 = 4, 15 – 10 = 5….

Now, we get an arithmetic sequence 2, 3, 4, 5

6. Mixed Series:

Example-10, 22, 46, 94, 190,?

10\times2 = 20 +2 = 22,22 \times 2 = 44 + 2 = 46,46 \times 2 = 92 + 2 = 94,94 \times 2 = 188 + 2 = 190,190 \times 2 = 380 + 2 = 382.
So the missing number is 382.

7. Arithmetic-Geometric Series:

Example- 1, 4, 8, 11, 22, 25, ?

Series Type +3 , \times2 ({\text{i.e Arithmetic and Geometric Mixing}})(e.g: 1+3=4;4\times 2=8)

8. Twin/Alternate series:

Example- 3, 4, 8, 10, 13, 16 ? ?
Sol: As we can see, there are two series formed
Series 1 : 3, 8, 13 with a common difference of 5
Series 2 : 4, 10, 16 with a common difference of 6
So, the next two terms of the series should be 18 & 22 respectively.

How to Solve Coding and Number Series Questions Quickly :

Question 1:

If in a certain language A is coded as 1, B is coded as 2, and so on, how is B I D D I C coded in that code?

Option:

A) 294493
B) 284563
C) 375582
D) 394492

Answer: A

Explanation:

As given the letters are coded as:

A   B   C   D   E   F   G   H   I
1    2   3    4    5   6    7   8    9
So, in B I D D I C, B is coded as 2, I as 9, D as 4, and C as 3. Thus, B I D D I C is coded as 294493.

Question 2:

If D is coded as 4 and C O V E R is coded as 63, then BASIS will be coded as?

Option:

A) 54
B) 55
C) 49
D) 50

Answer: D

Explanation:

It is clear that the code is arrange in this mannerA = 1. B = 2, C = 3 … so on

so that C O V E R is coded as  [C+O+V+E+R]

⇒ 3 + 15 + 22 + 5 + 18 = 63.

Now B A S I S is coded as [ B+A+S+I+S]

⇒2 + 1 + 19 + 9 + 19 = 50.

Question 3:

bcd’ is coded as ‘def’ then ‘True’ is coded as……….

Options:

A) Hynx
B) Vrwx
C) Zbyw
D) Vtwg

Answer: D

Explanation:

b – d (+2)
c – e (+2)
d – f (+2)
+2 letters are considered in this code.
True – Vtwg

Question 4:

In a certain code ‘MONARCHY’ is written as ‘NPOBSDIZ’. How will ‘STANDARD’ be written as in that code?

Options:

A) TUBOEBSE
B) TVBSHBNW
C) WEHJSOLX
D) GHWQMKLJ

Answer: A

Explanation:

Each letter of MONARCHY is replaced by the next letter as per  the alphabet

M+ 1 = N
O+ 1 = P
N+ 1 = O
A+ 1 = B
R+ 1 = S
C + 1= D
H+ 1 = I
Y+ 1 = Z

Similarly, STANDARD is written as TUBOEBSE

Question 5: 

If the word is KEYBOARD written as LGBFTGYL then, what will be the code for INTERNET ?

A)JPWHUPHW
B)JPHWIUYTP
C)JPWIWTLB
D)None of the above


Explanation:
The 1st, 2nd, 3rd ………. And so on alphabet of the word are moved 1, 2, 3….. Steps forward respectively.
KEYBOARD will be coded as LGBFTGYL
INTERNET will be written as JPWIWTLB

Prime Course Trailer

Related Banners

Get PrepInsta Prime & get Access to all 200+ courses offered by PrepInsta in One Subscription

Get Prime

Also Check Out

Questions for Coding and Number Series
Rules and Formulas Coding and Number Series Questions quickly
Tips, Tricks and shortcuts for Coding and Number Series
Branding

Get over 200+ course One Subscription

Courses like AI/ML, Cloud Computing, Ethical Hacking, C, C++, Java, Python, DSA (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others

Get Prime
Course List
Course List

Checkout list of all the video courses in PrepInsta Prime Subscription

Checkout list of all the video courses in PrepInsta Prime Subscription

Checkout
Checkout