Math Problem Statement

Determine the digit 50 places to the right of the decimal point in the decimal representation of 5/27. What digit is in the thousandth's place?

Solution

Let's solve this question step by step.

Step 1: Decimal Representation of 5/27

To find the decimal representation of 527\frac{5}{27}, we perform the division: 527=0.185\frac{5}{27} = 0.\overline{185} This means that the decimal representation of 527\frac{5}{27} is a repeating decimal 0.1851851850.185185185\ldots with a repeating block of "185."

Step 2: Determining the 50th Decimal Place

The repeating block "185" has 3 digits. To find the digit at the 50th decimal place, we need to determine the position within this repeating sequence:

  1. Divide 50 by the length of the repeating sequence, which is 3: 50÷3=16 remainder 250 \div 3 = 16 \text{ remainder } 2
  2. The remainder of 2 indicates that the 50th digit falls on the 2nd digit within the repeating block "185."

In "185", the second digit is 8.

Step 3: Thousandth’s Place

The repeating decimal 0.1850.185 places the digit "1" in the thousandth’s position since it falls directly in the first place of the repeating block.

Final Answers

  1. 50th Digit: 8
  2. Thousandth’s Place: 1

Would you like more details on how to tackle repeating decimals, or do you have further questions?

Here are five related questions for practice:

  1. What is the 25th digit to the right of the decimal in the decimal representation of 527\frac{5}{27}?
  2. If 799=0.07\frac{7}{99} = 0.\overline{07}, what is the 100th digit to the right of the decimal?
  3. Determine the 10th digit in the repeating decimal of 311\frac{3}{11}.
  4. Find the digit in the 20th place of the decimal expansion of 27\frac{2}{7}.
  5. What digit is in the hundredth’s place of 433\frac{4}{33}?

Tip: When dealing with repeating decimals, find the repeating block and use modular arithmetic to locate specific digits in large positions.

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Math Problem Analysis

Mathematical Concepts

Decimal Representation
Repeating Decimals
Modular Arithmetic

Formulas

Division of 5 by 27 to get repeating decimal
Modular arithmetic to locate position in repeating block

Theorems

Concept of repeating decimals and modular arithmetic

Suitable Grade Level

Grades 9-10