# 28

= 2 × 2 × 7

= 2 × 14
= 4 × 7

= 1 + 2 + 3 + 4 + 5 + 6 + 7
A triangular number.

There are 28 days in February, except in leap years.

28 is a perfect number because it equals the sum of all its factors (apart from 28 itself).

There are 28 digits in one cubit. The ancient Egyptians had their own system for measuring length based on body lengths. A digit was based on the width of one finger (about 19 mm). A cubit was the distance measured from the elbow to the tips of the fingers, and this equalled 28 digits.

Use a ruler to measure a digit and a cubit on yourself. How many of your digits make one cubit? How close is it to 28? Take measurements from a number of different people. How close are they to 28?
The passage provides various facts about the number 28, including its mathematical properties and historical context, and ends with a suggestion for a practical measurement activity.
no_question

the passage does not contain a direct mathematical question that requires a specific answer, even though it suggests an activity that involves measurement and comparison.
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
# 28

= 2 × 2 × 7

= 2 × 14
= 4 × 7

= 1 + 2 + 3 + 4 + 5 + 6 + 7
A triangular number.

There are 28 days in February, except in leap years.

28 is a perfect number because it equals the sum of all its factors (apart from 28 itself).

There are 28 digits in one cubit. The ancient Egyptians had their own system for measuring length based on body lengths. A digit was based on the width of one finger (about 19 mm). A cubit was the distance measured from the elbow to the tips of the fingers, and this equalled 28 digits.

Use a ruler to measure a digit and a cubit on yourself. How many of your digits make one cubit? How close is it to 28? Take measurements from a number of different people. How close are they to 28?
user
The passage provides various facts about the number 28, including its mathematical properties and historical context, and ends with a suggestion for a practical measurement activity.

TYPE: NO_QUESTION

The passage does not contain a direct mathematical question that requires a specific answer, even though it suggests an activity that involves measurement and comparison.