【SPI非言語 #01】推論（順序/内訳）タテ型｜適性検査（テストセンター/WEBテスト）

Summary

This video tutorial guides viewers through solving a logical order problem commonly found in SPI exams, specifically focusing on determining the arrival sequence of four individuals (A, B, C, D). The instructor explains how to break down the conditions, such as A arriving after C, B arriving before D, and C not being first, to deduce possible arrival orders. The video then evaluates multiple-choice statements, identifying which ones are 'not necessarily false.' By the end, viewers learn effective strategies for solving such logic puzzles, boosting their confidence in tackling similar questions on exams like SPI.

Takeaways

• 😀 Understand the importance of breaking down complex ranking problems using given conditions to narrow down possible outcomes.
• 😀 For ranking problems, make use of visual aids like boxes or tables to organize information and simplify the process of determining order.
• 😀 In ranking problems, it's crucial to consider all possible arrangements based on given constraints to identify valid solutions.
• 😀 The phrase 'not necessarily incorrect' in a problem means that finding one correct solution is enough to validate a statement, even if other solutions may not match.
• 😀 In distribution problems, start by defining the basic conditions and calculating combinations that meet those conditions.
• 😀 When working with distribution problems, always check whether all conditions (like buying at least one of each type) are satisfied before confirming your solution.
• 😀 In ranking problems, focus on the exact relationships between individuals, such as who arrived before or after whom, to construct the correct order.
• 😀 Solving ranking problems quickly becomes easier once you are familiar with the structure of the problem and apply step-by-step logic to fill in the gaps.
• 😀 By working through similar problems multiple times, you can train yourself to recognize patterns and speed up problem-solving in exams like SPI.
• 😀 Be cautious when interpreting problem statements; ensure the conditions given are followed strictly, especially in problems that involve multiple categories (e.g., types of bread).

Q & A

What is the main theme of the video?

The main theme of the video is about solving a specific SPI test problem related to the arrival order of four individuals (A, B, C, D). The video provides a step-by-step approach to understanding the conditions given in the problem and how to derive the correct order.

What conditions are provided regarding the arrival order of the four people (A, B, C, D)?

The conditions provided are: 1) A arrived after C. 2) B arrived before D. 3) C was not the first to arrive.

How does the video recommend solving such problems?

The video recommends breaking down the problem by organizing the conditions systematically and using a box or table to visualize the possible orderings. The solution involves considering all possible scenarios based on the given conditions and eliminating invalid ones.

What is the significance of the condition that 'C was not the first to arrive'?

The condition that 'C was not the first to arrive' eliminates the possibility of C being in the first position in the arrival order, helping narrow down the possible sequences for the other individuals.

What are the possible arrival order patterns based on the conditions?

The possible arrival order patterns, after considering the conditions, are: 1) B, C, A, D, 2) B, C, D, A, and 3) B, D, C, A.

What does '必ずしも誤りとは言えない' (not necessarily false) mean in this context?

In this context, 'not necessarily false' means that a statement could be true in some scenarios, but not necessarily in all. Therefore, it is not definitively false and may be valid under certain conditions.

Which of the statements (A, E, U) are 'not necessarily false' according to the video?

The statements 'E' ('The second to arrive was C') and 'U' ('The third to arrive was D') are 'not necessarily false' because they are true in at least one of the possible orderings derived from the given conditions.

Why is statement A ('The first to arrive was A') considered false?

Statement A is considered false because, in all of the valid possible orderings, A is never the first to arrive. Therefore, it does not hold true under any scenario.

What is the correct answer to the problem presented in the video?

The correct answer to the problem is 'E' and 'U' because these statements are not necessarily false, while statement A is definitively false.

What role does organizing the conditions in a table or box play in solving such problems?

Organizing the conditions in a table or box helps visualize the relationships between the variables (A, B, C, D), making it easier to narrow down the possible solutions and track which scenarios are valid or invalid.