LCM Calculator
Calculating the Least Common Multiple (LCM)
The Least Common Multiple (LCM) of two or more integers is the smallest positive integer that is divisible by each of the given numbers without leaving a remainder. The LCM is useful when dealing with problems involving addition or subtraction of fractions, finding common denominators, or solving problems related to repeating events.
To find the LCM of a set of numbers, you can use the relationship between the Greatest Common Divisor (GCD) and the LCM:
\( \text{LCM}(a, b) = \dfrac{|a \times b|}{\text{GCD}(a, b)} \)
This formula can be extended to more than two numbers by iteratively calculating the LCM of the current result and the next number in the list.
Examples
Let's go through some examples to understand how to calculate the LCM of different sets of numbers.
1. Calculate the LCM of 10, 40, and 15.
Answer
First, we identify the given numbers:
Given:
We begin by calculating the LCM of the first two numbers:
Steps:
- LCM(10, 40) = \(\dfrac{|10 \times 40|}{\text{GCD}(10, 40)}\)
- GCD(10, 40) = 10
- LCM(10, 40) = \(\dfrac{400}{10} = 40\)
Next, we calculate the LCM of 40 and 15:
- LCM(40, 15) = \(\dfrac{|40 \times 15|}{\text{GCD}(40, 15)}\)
- GCD(40, 15) = 5
- LCM(40, 15) = \(\dfrac{600}{5} = 120\)
Thus, the LCM of 10, 40, and 15 is 120.
Result:
∴ The LCM of 10, 40, and 15 is 120.
2. Find the LCM of 12 and 18.
Answer
We start by identifying the numbers:
Given:
We calculate the LCM using the formula:
Steps:
- LCM(12, 18) = \(\dfrac{|12 \times 18|}{\text{GCD}(12, 18)}\)
- GCD(12, 18) = 6
- LCM(12, 18) = \(\dfrac{216}{6} = 36\)
The LCM of 12 and 18 is 36.
Result:
∴ The LCM of 12 and 18 is 36.
3. Determine the LCM of 7, 5, and 3.
Answer
First, we identify the given numbers:
Given:
We begin by calculating the LCM of the first two numbers:
Steps:
- LCM(7, 5) = \(\dfrac{|7 \times 5|}{\text{GCD}(7, 5)}\)
- GCD(7, 5) = 1
- LCM(7, 5) = \(\dfrac{35}{1} = 35\)
Next, we calculate the LCM of 35 and 3:
- LCM(35, 3) = \(\dfrac{|35 \times 3|}{\text{GCD}(35, 3)}\)
- GCD(35, 3) = 1
- LCM(35, 3) = \(\dfrac{105}{1} = 105\)
Thus, the LCM of 7, 5, and 3 is 105.
Result:
∴ The LCM of 7, 5, and 3 is 105.
4. Find the LCM of 8, 9, and 12.
Answer
We start by identifying the numbers:
Given:
We calculate the LCM of the first two numbers:
Steps:
- LCM(8, 9) = \(\dfrac{|8 \times 9|}{\text{GCD}(8, 9)}\)
- GCD(8, 9) = 1
- LCM(8, 9) = \(\dfrac{72}{1} = 72\)
Next, we calculate the LCM of 72 and 12:
- LCM(72, 12) = \(\dfrac{|72 \times 12|}{\text{GCD}(72, 12)}\)
- GCD(72, 12) = 12
- LCM(72, 12) = \(\dfrac{864}{12} = 72\)
Thus, the LCM of 8, 9, and 12 is 72.
Result:
∴ The LCM of 8, 9, and 12 is 72.
{
"topic": "lcm",
"input_types": [
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"input_labels": [
"Numbers (comma separated values)"
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"input_values": [
"10, 40, 15"
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"type": "Calculate",
"title": "LCM",
"category": "Arithmetic",
"function": "function myFunc(arr) {\n let ip = arr[0];\n if (!ip) return \"No values provided.\";\n const numbers = ip.split(',').filter(value => value.trim() !== '').map(value => Number(value.trim()));\n if (numbers.some(isNaN)) return \"Please provide a valid list of numbers.\";\n if (!numbers || numbers.length === 0) return \"No numbers provided.\";\n const calculateGCD = (x, y) => (y === 0 ? x : calculateGCD(y, x % y));\n const calculateLCM = (a, b) => (Math.abs(a * b) / calculateGCD(a, b));\n let lcm = numbers[0];\n for (let i = 1; i < numbers.length; i++) {\n lcm = calculateLCM(lcm, numbers[i]);\n }\n return lcm;\n }",
"op_label": "LCM",
"explanation": "The Least Common Multiple (LCM) of two or more integers is the smallest positive integer that is divisible by each of the given integers without leaving a remainder. In other words, it's the smallest common multiple of the numbers.",
"content": "<h2>Calculating the Least Common Multiple (LCM)</h2>\n<p>The Least Common Multiple (LCM) of two or more integers is the smallest positive integer that is divisible by each of the given numbers without leaving a remainder. The LCM is useful when dealing with problems involving addition or subtraction of fractions, finding common denominators, or solving problems related to repeating events.</p>\n<p>To find the LCM of a set of numbers, you can use the relationship between the Greatest Common Divisor (GCD) and the LCM:</p>\n<p class=\"tabspace\">\\( \\text{LCM}(a, b) = \\dfrac{|a \\times b|}{\\text{GCD}(a, b)} \\)</p>\n<p>This formula can be extended to more than two numbers by iteratively calculating the LCM of the current result and the next number in the list.</p>\n\n<h2>Examples</h2>\n<p>Let's go through some examples to understand how to calculate the LCM of different sets of numbers.</p>\n\n<div class=\"example\"><h3 class=\"question\"><span class=\"example_n\">1.</span> Calculate the LCM of 10, 40, and 15.</h3><h4 class=\"answer\">Answer</h4>\n<p>First, we identify the given numbers:</p>\n<p><b>Given:</b></p><ul><li>Numbers: 10, 40, 15</li></ul>\n<p>We begin by calculating the LCM of the first two numbers:</p>\n<p><b>Steps:</b></p><ul><li>LCM(10, 40) = \\(\\dfrac{|10 \\times 40|}{\\text{GCD}(10, 40)}\\)</li>\n<li>GCD(10, 40) = 10</li>\n<li>LCM(10, 40) = \\(\\dfrac{400}{10} = 40\\)</li></ul>\n<p>Next, we calculate the LCM of 40 and 15:</p>\n<ul><li>LCM(40, 15) = \\(\\dfrac{|40 \\times 15|}{\\text{GCD}(40, 15)}\\)</li>\n<li>GCD(40, 15) = 5</li>\n<li>LCM(40, 15) = \\(\\dfrac{600}{5} = 120\\)</li></ul>\n<p>Thus, the LCM of 10, 40, and 15 is 120.</p>\n<p><b>Result:</b></p><p class=\"tabspace answer\">∴ The LCM of 10, 40, and 15 is 120.</p></div>\n\n<div class=\"example\"><h3 class=\"question\"><span class=\"example_n\">2.</span> Find the LCM of 12 and 18.</h3><h4 class=\"answer\">Answer</h4>\n<p>We start by identifying the numbers:</p>\n<p><b>Given:</b></p><ul><li>Numbers: 12, 18</li></ul>\n<p>We calculate the LCM using the formula:</p>\n<p><b>Steps:</b></p><ul><li>LCM(12, 18) = \\(\\dfrac{|12 \\times 18|}{\\text{GCD}(12, 18)}\\)</li>\n<li>GCD(12, 18) = 6</li>\n<li>LCM(12, 18) = \\(\\dfrac{216}{6} = 36\\)</li></ul>\n<p>The LCM of 12 and 18 is 36.</p>\n<p><b>Result:</b></p><p class=\"tabspace answer\">∴ The LCM of 12 and 18 is 36.</p></div>\n\n<div class=\"example\"><h3 class=\"question\"><span class=\"example_n\">3.</span> Determine the LCM of 7, 5, and 3.</h3><h4 class=\"answer\">Answer</h4>\n<p>First, we identify the given numbers:</p>\n<p><b>Given:</b></p><ul><li>Numbers: 7, 5, 3</li></ul>\n<p>We begin by calculating the LCM of the first two numbers:</p>\n<p><b>Steps:</b></p><ul><li>LCM(7, 5) = \\(\\dfrac{|7 \\times 5|}{\\text{GCD}(7, 5)}\\)</li>\n<li>GCD(7, 5) = 1</li>\n<li>LCM(7, 5) = \\(\\dfrac{35}{1} = 35\\)</li></ul>\n<p>Next, we calculate the LCM of 35 and 3:</p>\n<ul><li>LCM(35, 3) = \\(\\dfrac{|35 \\times 3|}{\\text{GCD}(35, 3)}\\)</li>\n<li>GCD(35, 3) = 1</li>\n<li>LCM(35, 3) = \\(\\dfrac{105}{1} = 105\\)</li></ul>\n<p>Thus, the LCM of 7, 5, and 3 is 105.</p>\n<p><b>Result:</b></p><p class=\"tabspace answer\">∴ The LCM of 7, 5, and 3 is 105.</p></div>\n\n<div class=\"example\"><h3 class=\"question\"><span class=\"example_n\">4.</span> Find the LCM of 8, 9, and 12.</h3><h4 class=\"answer\">Answer</h4>\n<p>We start by identifying the numbers:</p>\n<p><b>Given:</b></p><ul><li>Numbers: 8, 9, 12</li></ul>\n<p>We calculate the LCM of the first two numbers:</p>\n<p><b>Steps:</b></p><ul><li>LCM(8, 9) = \\(\\dfrac{|8 \\times 9|}{\\text{GCD}(8, 9)}\\)</li>\n<li>GCD(8, 9) = 1</li>\n<li>LCM(8, 9) = \\(\\dfrac{72}{1} = 72\\)</li></ul>\n<p>Next, we calculate the LCM of 72 and 12:</p>\n<ul><li>LCM(72, 12) = \\(\\dfrac{|72 \\times 12|}{\\text{GCD}(72, 12)}\\)</li>\n<li>GCD(72, 12) = 12</li>\n<li>LCM(72, 12) = \\(\\dfrac{864}{12} = 72\\)</li></ul>\n<p>Thus, the LCM of 8, 9, and 12 is 72.</p>\n<p><b>Result:</b></p><p class=\"tabspace answer\">∴ The LCM of 8, 9, and 12 is 72.</p></div>"
}
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