In the following question, select the odd letter/letters from the given alternatives.

Question

Prepp Team · Accepted Answer

Finding the Odd Letter Group in a Series

This question asks us to identify the letter group that doesn't follow the same pattern as the others from the given alternatives. To solve this, we need to look at the positions of the letters in the English alphabet and find a relationship between them.

Analyzing Letter Positions

Let's assign a numerical value to each letter based on its position in the alphabet (A=1, B=2, ..., Z=26).

Option 1: PLH

P is the 16th letter.
L is the 12th letter.
H is the 8th letter.

Let's look at the difference between consecutive letter positions:

\(16 - 12 = 4\)
\(12 - 8 = 4\)

The pattern here is a decrease of 4 between each letter.

Option 2: KGC

K is the 11th letter.
G is the 7th letter.
C is the 3rd letter.

Let's look at the difference between consecutive letter positions:

\(11 - 7 = 4\)
\(7 - 3 = 4\)

The pattern here is a decrease of 4 between each letter.

Option 3: ZVR

Z is the 26th letter.
V is the 22nd letter.
R is the 18th letter.

Let's look at the difference between consecutive letter positions:

\(26 - 22 = 4\)
\(22 - 18 = 4\)

The pattern here is a decrease of 4 between each letter.

Option 4: TPK

T is the 20th letter.
P is the 16th letter.
K is the 11th letter.

Let's look at the difference between consecutive letter positions:

\(20 - 16 = 4\)
\(16 - 11 = 5\)

The pattern here is a decrease of 4, then a decrease of 5. This is different from the pattern observed in the other options.

Identifying the Odd One Out

Options PLH, KGC, and ZVR all follow a consistent pattern where each subsequent letter's position in the alphabet is 4 less than the previous one. Option TPK follows a pattern where the first difference is 4, but the second difference is 5.

Therefore, TPK is the letter group that is different from the others.

Conclusion

Based on the pattern of decreasing letter positions, TPK is the odd letter group among the given alternatives because it does not follow the consistent -4, -4 pattern seen in PLH, KGC, and ZVR.

Summary of Letter Positions and Differences
Group	Letter Positions	Differences	Pattern
PLH	16, 12, 8	16-12=4, 12-8=4	-4, -4
KGC	11, 7, 3	11-7=4, 7-3=4	-4, -4
ZVR	26, 22, 18	26-22=4, 22-18=4	-4, -4
TPK	20, 16, 11	20-16=4, 16-11=5	-4, -5

Revision Table: Odd Letter Group Analysis

Key Findings for Letter Series Question
Concept	Explanation
Letter Position	Using the alphabetical order (A=1, B=2, ..., Z=26) is crucial for identifying numerical patterns in letter series.
Pattern Identification	Look for differences, sums, or other relationships between the numerical values of consecutive letters in each group.
Odd One Out	The group that does not follow the pattern observed in the majority of the options is the odd one out.

Additional Information: Solving Letter Series Problems

Letter series questions are common in reasoning tests. They require you to find the rule that connects the letters in a sequence or a group. Here are some tips for solving them:

Write down the alphabet and its corresponding numerical positions (1 to 26). This makes calculations easier.
Check for simple arithmetic patterns like addition, subtraction, multiplication, or division between letter positions.
Look for patterns involving squares, cubes, or prime numbers related to the positions.
Consider reverse alphabetical order (Z=1, Y=2, etc.) if forward order doesn't reveal a pattern.
Sometimes patterns involve skipping a fixed number of letters.
The pattern might alternate between different operations or values.
If groups of letters are given, the pattern might be within each group or between groups.

Practicing various types of letter series and letter group questions will help you become familiar with common patterns and improve your speed and accuracy.