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Question

Find the value of \( \sqrt{125 + \sqrt{344 + \sqrt{289}}} \).

The correct answer is
12

Solving Nested Square Roots Step-by-Step

To find the value of the expression \( \sqrt{125 + \sqrt{344 + \sqrt{289}}} \), we need to simplify it by starting from the innermost square root and working outwards.

Step 1: Simplify the Innermost Square Root

First, calculate the square root of 289:

  • \( \sqrt{289} \)
  • We know that \( 17 \times 17 = 289 \).
  • Therefore, \( \sqrt{289} = 17 \).

Step 2: Substitute and Simplify the Next Layer

Now substitute the result back into the expression:

  • \( \sqrt{125 + \sqrt{344 + 17}} \)
  • Add the numbers inside the second square root: \( 344 + 17 = 361 \).
  • The expression becomes \( \sqrt{125 + \sqrt{361}} \).

Step 3: Calculate the Second Square Root

Next, calculate the square root of 361:

  • \( \sqrt{361} \)
  • We know that \( 19 \times 19 = 361 \).
  • Therefore, \( \sqrt{361} = 19 \).

Step 4: Substitute and Simplify the Final Layer

Substitute this result back into the expression:

  • \( \sqrt{125 + 19} \)
  • Add the numbers inside the final square root: \( 125 + 19 = 144 \).
  • The expression simplifies to \( \sqrt{144} \).

Step 5: Calculate the Final Square Root

Finally, calculate the square root of 144:

  • \( \sqrt{144} \)
  • We know that \( 12 \times 12 = 144 \).
  • Therefore, \( \sqrt{144} = 12 \).

Final Answer

The value of the expression \( \sqrt{125 + \sqrt{344 + \sqrt{289}}} \) is 12.

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Important Questions from Simplification

  1. Simplify the following expression.

    \(\left(\frac{7}{16} \div \frac{1}{2}\:of\: \frac{1}{5}\right)\times \frac{4}{5}-\frac{1}{3}\times\frac{5}{8}\div \frac{1}{2}+\frac{3}{4}\)

  2. The value of \(\left( {2\frac{6}{7}of4\frac{1}{5} \div \frac{2}{3}} \right) \times 5\frac{1}{9} \div \left( {\frac{3}{4} \times 2\frac{2}{3}of\frac{1}{2} \div \frac{1}{4}} \right)\)  is:

  3. The value of \(\left[ {\frac{4}{7}\rm \;of\;2\frac{4}{5} \times 1\frac{2}{3} - \left( {3\frac{1}{2} - 2\frac{1}{6}} \right)} \right] \div \left( {3\frac{1}{5} \div 4\frac{1}{2}\;\rm of\;\;5\frac{1}{3}} \right)\)  is:

  4. The value of \(\frac{{0.0203 \times 2.92}}{{0.7 \times 0.0365 \times 2.9}} \div \frac{{{{\left( {12.12} \right)}^2} - {{\left( {8.12} \right)}^2}}}{{{{\left( {0.25} \right)}^2} + \left( {0.25} \right)\left( {19.99} \right)}}\)  is:

  5. The value of 4 ÷ 12 of [3 ÷ 4 of {(4 - 2) × 6 ÷ 2}] - 2 × 6 ÷ 8 + 3 is:

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