Math Problem Statement

Arjun says that because 1/12 and 2/12 produce repeating decimal values, any fraction with a denominator of 12 will also produce a repeating decimal. Is Arjun correct?

Solution

The question asks whether Arjun's statement is correct regarding fractions with a denominator of 12 always producing repeating decimals. He claims that since 112\frac{1}{12} and 212\frac{2}{12} produce repeating decimal values, all fractions with denominator 12 will do so.

Let's analyze the situation:

  • 112=0.08333\frac{1}{12} = 0.08333\ldots (a repeating decimal).
  • 212=0.16666\frac{2}{12} = 0.16666\ldots (also a repeating decimal).

Arjun assumes that this pattern applies to any fraction with a denominator of 12.

However, not all fractions produce repeating decimals. For instance:

  • 312=0.25\frac{3}{12} = 0.25, which is a terminating decimal.

Therefore, Arjun's claim is incorrect. While many fractions with a denominator of 12 do produce repeating decimals, not all of them do, as demonstrated by 312\frac{3}{12}, which results in a terminating decimal.

The correct answer is No.

Would you like further details on how repeating and terminating decimals work?

Here are five related questions to expand your knowledge:

  1. What types of fractions result in repeating decimals?
  2. How can you determine whether a fraction will produce a repeating or terminating decimal?
  3. Are there other common denominators like 12 that produce both repeating and terminating decimals?
  4. What is the relationship between prime factors of a denominator and repeating decimals?
  5. How do you convert a repeating decimal back into a fraction?

Tip: A fraction produces a terminating decimal if its denominator has only the prime factors 2 and 5 after simplification. Otherwise, it will result in a repeating decimal.

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Math Problem Analysis

Mathematical Concepts

Fractions
Decimal Representation

Formulas

Fraction to decimal conversion

Theorems

Terminating and Repeating Decimals Theorem

Suitable Grade Level

Grades 5-7