Analogy Explanation - Science Olympiad Class 6 PDF Download

Analogous Pairs

An important type of analogy questions is based on analogous pairs. In these questions a pair (or a group) of items is related by a rule. You must find the rule that connects the given pair and then apply the same rule to complete another pair or series. This chapter explains the idea of analogous pairs, shows common types, gives stepwise strategies to solve them, and works through examples so that a student can practise and gain confidence.

What is an Analogous Pair?

An analogous pair is a pair of words, numbers, letters or objects that are connected by a particular relation or rule. In an analogy question we compare two items to understand the relationship between them. Once the rule connecting the first pair is clear, we apply the same rule to another item or pair to find the required term.

Example (informal): A couple names their first child A, the second B, the third C and so on. If someone asks for the name of the fifth child, we can answer E because we recognise the pattern of the alphabetical order. Similarly, in analogy problems we identify the pattern or rule and use it to predict the missing term.

How to approach and solve analogy questions

1. Read the pair carefully. Note what kind of elements are present - letters, words, numbers, or everyday objects.
2. Find the relationship. Ask how the two terms are related: by position, by meaning, by function, by number pattern, or by some other rule.
3. Apply the rule to the second pair or item. Test if the same relation holds. If not, reconsider the rule.
4. Check all answer options. Eliminate options that clearly do not follow the discovered relation.
5. Watch for traps. Some options may look similar but be less accurate; choose the most precise option as required by the question.

Common types of analogies

• Letter analogies - relations based on positions or fixed gaps in the alphabet.
• Number analogies - relations based on arithmetic, sequences, differences or ratios.
• Vocabulary / Meaning analogies - synonym, antonym, degree, or category relations (e.g., apple : fruit).
• Function or use analogies - one item’s use compared to another’s (e.g., pen : write :: knife : cut).
• Part–whole or whole–part analogies - a part related to its whole (e.g., petal : flower).
• Cause–effect analogies - a cause related to its effect (e.g., fire : burn).
• Classification analogies - item to its class (e.g., lion : mammal).
• Awareness/general knowledge analogies - require factual knowledge (diseases and their agents, planets and their features).

Letter Analogy

Example 1: Find the missing term:

AEI: LQV:: ACE: H_,_

(a) OP

(b) DC

(c) KN

(d) QW

Ans: (c)

Explanation: In letter-analogy questions we try to discover the alphabetic pattern or rule that links the letters of the first group and then apply the same rule to the second group.

Observe the first group AEI and its corresponding group LQV. Notice that each position in the first group maps to a corresponding position in the second group by a fixed letter shift that is consistent for the pair as a whole. After identifying the shift pattern from the first complete pair, apply the same shift to the letters in the second group ACE. Use the shift to convert ACE into the answer choices; the option that matches the shifted result is the correct one. Following this careful comparison leads to the correct answer (c).

Awareness‑Based Analogies

These analogies need factual knowledge or awareness of common concepts. The relation is usually obvious once you recognise the topic.

Example 2: Complete the analogy:

Polio: virus :: food poisoning: __________

(a) Fungi

(b) Algae

(c) Nematodes

(d) Bacteria

Ans: (d)

Explanation: The rule is “disease : type of organism that causes it.” Polio is caused by a virus. Food poisoning is most commonly caused by bacteria such as Salmonella and Listeria. Therefore the correct analogue is (d) Bacteria.

Vocabulary‑Based Analogy

These analogies test understanding of word meanings, symptom–disease relations, or common phrases. Choose the option that best matches the relationship in the given pair.

Example 3: Complete the following:

Alzheimer’s disease : Dementia :: food poisoning :  ________

(a) High fever

(b) Bloating

(c) Bleeding

(d) Running  nose

Ans: (b)

Explanation: The relation in the first pair is “disease : a typical symptom/condition caused by the disease.” Alzheimer’s disease commonly leads to dementia. A typical symptom of food poisoning is bloating; it is the most suitable match among the given options. Hence (b) is the best answer.

More examples of analogy types (short list)

• Synonym analogy: fast : quick :: angry : irate
• Antonym analogy: hot : cold :: happy : sad
• Function analogy: key : lock :: brush : hair
• Part–whole: petal : flower :: wheel : bicycle
• Cause–effect: rain : flood :: heat : evaporation
• Category/classification: oak : tree :: tiger : animal

Common tips and traps

• Always identify the relation first. Do not guess the answer from one or two letters alone.
• Check position-wise correspondence. The first item in the first pair usually corresponds to the first item in the second pair, and so on.
• Beware of partial matches. An option that matches only one part of the rule is not always correct.
• When in doubt, test the rule on all terms. Apply your rule across the entire pair to confirm consistency.
• Use elimination. Remove options that clearly violate the discovered relationship.

Practice advice

• Begin with letter and number analogies - they have clear, mechanical rules.
• Build vocabulary for meaning-based analogies: learn common antonyms, synonyms, and category words.
• Read short factual material (health, biology, geography) to improve awareness-based analogies.
• Time yourself while practising so that you can spot easy analogies quickly in exams.

By following the approach described in this chapter - carefully observing the given pair, finding the relation, and applying it to the second pair - students will be able to solve analogy questions more confidently. Practice with many examples of each type to recognise patterns faster.