SSC CGL - Analogy E-Book Study Material

Analogy

Analogy is a fundamental reasoning concept that involves identifying relationships between pairs of items (words, numbers, figures, etc.) and then applying that same relationship to a new item. In essence, it's about understanding similarities and connections. For the SSC CGL exam, analogy questions test your ability to perceive patterns and relationships, whether logical, functional, or conceptual.

Types of Analogies

Analogies can be presented in various forms, and understanding these forms is the first step to solving them effectively. The most common types involve words, numbers, and figures.

1. Verbal Analogies (Word Analogies)

These are the most frequent type. They present a pair of words with a specific relationship, followed by a third word and four options. You need to find the option that forms a pair with the third word, maintaining the same relationship as the first pair.

The core of solving verbal analogies lies in accurately identifying the relationship between the first two words. Once you've pinpointed this relationship, you can apply it to find the correct answer.

Common Relationships in Verbal Analogies:

Part-Whole: One word is a component of the other. (e.g., Finger : Hand)
Cause-Effect: One word leads to the other. (e.g., Virus : Disease)
Worker-Tool: One word is a worker and the other is their tool. (e.g., Carpenter : Hammer)
Worker-Product: One word is a worker and the other is their creation. (e.g., Potter : Pot)
Synonym/Antonym: Words have similar or opposite meanings. (e.g., Happy : Joyful, Brave : Cowardly)
Degree: One word is a more intense version of the other. (e.g., Warm : Hot)
User-Object: One word is a user and the other is an object they use. (e.g., Doctor : Stethoscope)
Item-Category: One word is an item belonging to a broader category. (e.g., Rose : Flower)
Action-Object: An action performed on an object. (e.g., Read : Book)
Geographical Location: A place and its associated location. (e.g., Paris : France)
Symbol-Meaning: A symbol and what it represents. (e.g., Dove : Peace)
Adjective-Noun: A descriptive word and the noun it describes. (e.g., Beautiful : Flower)

Let's look at an example:

Example 1: Book : Page :: House : ? (A) Door (B) Room (C) Window (D) Wall

Analysis: The relationship between "Book" and "Page" is that a page is a part of a book. Applying this part-whole relationship, we look for a part of a "House". A "Room" is a part of a house.

Answer: (B) Room

Example 2: Doctor : Hospital :: Teacher : ? (A) Student (B) Book (C) School (D) Pen

Analysis: A Doctor works in a Hospital. Similarly, a Teacher works in a School.

Answer: (C) School

Memory Trick for Verbal Analogies: When faced with a word analogy, try to frame the relationship as a sentence. For example, "A [Word 1] is a part of a [Word 2]" or "A [Word 1] uses a [Word 2] to perform an action." Once you have this sentence, plug in the options to see which one fits best.

2. Number Analogies

These analogies involve pairs of numbers or number series. You need to identify the mathematical or logical relationship between the numbers in the first pair and apply it to find the missing number in the second pair.

Common operations include addition, subtraction, multiplication, division, squaring, cubing, finding the sum of digits, reversing digits, and combinations of these.

Common Relationships in Number Analogies:

Arithmetic Operations: Simple addition, subtraction, multiplication, or division.
Powers and Roots: Squaring, cubing, square roots, cube roots.
Sum of Digits: Operations performed on the individual digits of a number.
Product of Digits: Multiplying the individual digits.
Reversing Digits: Reading the number backward.
Prime Numbers: Identifying prime number relationships.
Progression: Arithmetic or geometric progression within the numbers.

Let's look at an example:

Example 3: 12 : 144 :: 15 : ? (A) 225 (B) 180 (C) 210 (D) 240

Analysis: The relationship between 12 and 144 is that 144 is the square of 12 (12² = 144). Applying this to 15, we calculate its square: 15² = 225.

Answer: (A) 225

Example 4: 23 : 46 :: 35 : ? (A) 70 (B) 65 (C) 75 (D) 80

Analysis: The relationship between 23 and 46 is that 46 is double 23 (23 * 2 = 46). Applying this to 35, we double it: 35 * 2 = 70.

Answer: (A) 70

Example 5: 48 : 12 :: 63 : ? (A) 9 (B) 18 (C) 21 (D) 24

Analysis: The relationship between 48 and 12 can be division (48 / 4 = 12). However, this might not be the only relationship. Let's consider the sum of digits. For 48, the sum of digits is 4 + 8 = 12. Applying this to 63, the sum of digits is 6 + 3 = 9.

Answer: (A) 9

Number Analogy Strategy: 1. Look for simple arithmetic operations (add, subtract, multiply, divide). 2. Check for squares, cubes, or roots. 3. Consider operations on digits (sum, product, reverse). 4. Try combining operations. 5. If numbers are large, look for patterns in the difference or ratio.

3. Figural Analogies (Visual Analogies)

These questions involve shapes or figures. You are given a pair of figures that have a specific transformation or relationship, and you must find a third figure that has the same relationship with a fourth figure from the given options.

The transformations can include rotation, reflection, addition/removal of elements, changes in shape, changes in shading, changes in size, or a combination of these.

Common Transformations in Figural Analogies:

Rotation: The figure is turned by a certain angle (e.g., 45°, 90°, 180°).
Reflection: The figure is mirrored horizontally or vertically.
Addition/Deletion: Elements are added to or removed from the figure.
Shading/Pattern Change: The internal shading or pattern of the figure changes.
Size Change: The figure becomes larger or smaller.
Shape Change: One shape transforms into another (e.g., circle to square).
Juxtaposition: Figures are placed next to each other.
Combination: Elements from two figures are combined.

Let's consider a conceptual example (as actual figures cannot be displayed here):

Example 6: Figure A shows a square with a diagonal line. Figure B shows the square with the diagonal line rotated 90 degrees clockwise. Figure C shows a circle with a horizontal line. Which figure is analogous to Figure D? (A) Circle with a vertical line rotated 90 degrees clockwise. (B) Circle with a horizontal line rotated 180 degrees. (C) Circle with a vertical line. (D) Circle with a horizontal line with a dot inside.

Analysis: The relationship between Figure A and Figure B is a 90-degree clockwise rotation of the internal line. Applying this to Figure C, we rotate the horizontal line 90 degrees clockwise, which results in a vertical line.

Answer: (C) Circle with a vertical line.

Figural Analogy Approach: 1. Carefully observe the first figure and identify its components and properties. 2. Analyze the transformation that occurs between the first and second figures. Note down the rule (e.g., rotation angle, reflection axis, element added/removed). 3. Apply the *exact same rule* to the third figure. 4. Compare the resulting figure with the given options and select the matching one. 5. If multiple rules seem possible, choose the simplest and most direct one.

Strategies for Solving Analogy Questions

To excel in analogy questions, adopting a systematic approach is crucial.

Understand the Relationship: This is the most critical step. For verbal analogies, try to describe the relationship between the first pair in a clear sentence. For number analogies, identify the mathematical operation or pattern. For figural analogies, determine the transformation rule.
Be Specific: Don't just say "related." Specify *how* they are related (e.g., "is a tool for," "is a part of," "is the opposite of," "is squared").
Maintain Consistency: The relationship identified in the first pair *must* be applied identically to the second pair. If you used multiplication in the first pair, use multiplication in the second. If you rotated 90 degrees clockwise, do the same for the second part.
Consider All Options: Sometimes, more than one option might seem plausible. Read all options carefully and choose the one that best fits the established relationship, often the most direct or logical connection.
Eliminate Incorrect Options: If you're unsure, try to eliminate options that clearly do not fit the relationship. This narrows down your choices.
Practice Different Types: Familiarize yourself with the various types of relationships and transformations. The more you practice, the quicker you'll become at recognizing patterns.
Vocabulary and General Knowledge: For verbal analogies, a strong vocabulary and general awareness are essential. If you don't know the meaning of a word or the connection between concepts, you'll struggle.
Mathematical Fluency: For number analogies, being comfortable with basic arithmetic, squares, cubes, and other mathematical operations is key.

Common Pitfalls to Avoid

Even with a good strategy, certain mistakes are common. Being aware of them can help you avoid them.

Reversing the Relationship: Applying the relationship backward. For example, if the first pair is "Dog : Bark" (Animal : Sound), don't look for "Sound : Animal" in the second pair.
Using a Different Relationship: Using one type of relationship for the first pair and a different one for the second.
Overlooking Simpler Relationships: Getting bogged down in complex calculations when a simple one works. Always start with the most straightforward connections.
Weak Vocabulary/Knowledge: Guessing based on superficial similarities rather than understanding the core relationship.
Ignoring Context: Not paying attention to the specific type of analogy (verbal, numerical, figural).

Example Walkthrough: Verbal Analogy

Question: Energy : Joule :: Power : ? (A) Watt (B) Force (C) Work (D) Ampere

Step 1: Understand the Relationship. Energy is measured in Joules. Joule is the SI unit of Energy.

Step 2: Apply the Relationship to the Second Pair. Power is measured in...? We need the SI unit of Power.

Step 3: Evaluate Options. (A) Watt: The SI unit of Power is Watt. (B) Force: Force is measured in Newtons. (C) Work: Work is measured in Joules (similar to energy). (D) Ampere: Ampere is the unit of electric current.

Step 4: Select the Best Fit. Option (A) perfectly matches the established relationship.

Answer: (A) Watt

Example Walkthrough: Number Analogy

Question: 5 : 30 :: 8 : ? (A) 64 (B) 72 (C) 80 (D) 88

Step 1: Understand the Relationship. Consider 5 and 30. - 5 + 25 = 30 - 5 * 6 = 30 - Sum of digits of 30 is 3+0 = 3 (not related to 5) - 5² = 25 (close, but not 30) The relationship "multiply by 6" (5 * 6 = 30) seems plausible.

Step 2: Apply the Relationship to the Second Pair. We need to apply "multiply by 6" to 8. 8 * 6 = 48. This is not among the options. This suggests our initial relationship might be incorrect or incomplete.

Step 3: Re-evaluate the Relationship. Let's re-examine 5 and 30. What if it's related to the next number? 5 * (5 + 1) = 5 * 6 = 30. This is a better, more generalizable rule.

Step 4: Apply the Revised Relationship. Apply the rule "Number * (Number + 1)" to 8. 8 * (8 + 1) = 8 * 9 = 72.

Step 5: Evaluate Options. (A) 64 (8²) (B) 72 (Matches our calculation) (C) 80 (8 * 10) (D) 88 (8 * 11)

Step 6: Select the Best Fit. Option (B) matches our derived relationship.

Answer: (B) 72

Example Walkthrough: Figural Analogy (Conceptual)

Question: Figure 1: A triangle with vertices labeled A, B, C. Figure 2: The same triangle, but the labels are now in clockwise order: C, A, B. Figure 3: A square with vertices labeled P, Q, R, S in clockwise order. Which figure is analogous to Figure 4? (A) Square with labels S, P, Q, R (clockwise). (B) Square with labels P, S, R, Q (counter-clockwise). (C) Square with labels Q, R, S, P (clockwise). (D) Square with labels P, Q, R, S (counter-clockwise).

Step 1: Understand the Relationship. Figure 1 shows labels A, B, C in clockwise order. Figure 2 shows the *same* vertices but re-labeled such that the sequence becomes C, A, B in clockwise order. This is a systematic shift or permutation of the labels while maintaining the shape and orientation. Specifically, A moves to B's original position, B moves to C's original position, and C moves to A's original position. It's a cyclic shift of labels.

Step 2: Apply the Relationship to the Third Figure. Figure 3 has labels P, Q, R, S in clockwise order. We need to apply the same cyclic shift of labels. P should move to Q's original position. Q should move to R's original position. R should move to S's original position. S should move to P's original position. So, the new sequence of labels in clockwise order should be S, P, Q, R.

Step 3: Evaluate Options. (A) Square with labels S, P, Q, R (clockwise). - Matches our derived sequence. (B) Square with labels P, S, R, Q (counter-clockwise). - Incorrect order and orientation. (C) Square with labels Q, R, S, P (clockwise). - Incorrect cyclic shift. (D) Square with labels P, Q, R, S (counter-clockwise). - Incorrect orientation.

Step 4: Select the Best Fit. Option (A) is the correct analogy.

Answer: (A)

Mastering analogies requires a keen eye for detail, logical deduction, and practice. By understanding the different types of relationships and transformations, and by employing systematic strategies, you can confidently tackle these questions in the SSC CGL exam.