Understanding Word Substitution Puzzles

This question is an example of a word substitution or coding puzzle. In these types of questions, common words are given new, made-up names. To solve them, you first need to figure out what the question is asking in the real world, and then apply the given code to find the coded name for the real item.

Identifying the Real Item in a Thermometer

The question asks what is used in 'thermometers'. In reality, a substance commonly used in traditional thermometers to measure temperature is mercury. Mercury expands and contracts with temperature changes, which is how the thermometer works.

Applying the Word Substitution Code

Now we need to look at the code provided in the question to see what 'mercury' is called according to the rules:

• 'white' is called 'bird'
• 'bird' is called 'mercury'
• 'mercury' is called 'curd'
• 'curd' is called 'detergent'
• 'detergent' is called 'white'

According to the code, 'mercury' is called 'curd'.

Determining the Coded Answer

Since mercury is used in thermometers, and the code says 'mercury' is called 'curd', then according to the rules of this puzzle, 'curd' is used in 'thermometers'.

Analyzing the Options

Let's look at the given options:

• detergent: The code says 'curd' is called 'detergent'. This is not what mercury is called according to the rule for 'mercury'.
• curd: The code says 'mercury' is called 'curd'. This matches our finding based on the real item used in thermometers.
• mercury: This is the real substance, but the question asks for its coded name within the puzzle's rules.
• white: The code says 'detergent' is called 'white'. This is not the coded name for mercury.

Based on the word substitution rules, the correct answer is 'curd'.

Revision Table: Thermometer Word Puzzle Logic

Additional Information: Mercury and Logic Puzzles

Mercury is a chemical element, symbol Hg. It's a dense, silvery liquid metal at standard temperature and pressure, famously used in older thermometers due to its thermal expansion properties. However, due to its toxicity, its use in consumer products like thermometers has decreased significantly.

Word coding or substitution puzzles are a common type of logical reasoning question. They assess your ability to disregard the common meaning of words and strictly apply a given set of rules or a code to find the answer within the puzzle's artificial context. The key is to focus on the rule that connects the real item to its coded name.