Preferred number

High school (ages 12+)
Mathematics & Numbers

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/preferred-number

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the interchangeability?A key outcome is enhanced compatibility and interchangeability of parts designed independently
2. What are preferred numbers?Preferred numbers are special numbers that help designers pick sizes that fit together easily. They are chosen so that each number is about the same size ratio to the next one. This makes parts match up well.
3. Why do we use preferred numbers in making toys or cars?They help because if a toy or car uses only a few common sizes, many parts can be made the same and used in many different products. That means fewer special parts and easier repairs.

Geometric Progression: A sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.
Renard Series: A set of preferred numbers based on geometric progressions, commonly used in engineering for standardization.
Interoperability: The ability of diverse systems and organizations to work together (interoperate) in a coordinated manner.
Logarithmic Scale: A scale of measurement that uses the logarithm of a physical quantity instead of the quantity itself, useful for representing very large ranges of values.