Math Problem Statement
Produce the least positive number that is divisible by 2, 3, 4, 5, 6, 7, 8, 9, 10, 11.
The number is___
Solution
To find the least positive number divisible by all the numbers from 2 to 11, we need to calculate the least common multiple (LCM) of these numbers.
Step-by-Step Calculation:
-
Prime factorizations of each number:
- 2 =
- 3 =
- 4 =
- 5 =
- 6 =
- 7 =
- 8 =
- 9 =
- 10 =
- 11 =
-
Take the highest powers of each prime factor:
- For 2: The highest power is (from 8).
- For 3: The highest power is (from 9).
- For 5: The highest power is (from 5 or 10).
- For 7: The highest power is (from 7).
- For 11: The highest power is (from 11).
-
Multiply these highest powers together to get the LCM:
Thus, the least positive number divisible by 2, 3, 4, 5, 6, 7, 8, 9, 10, and 11 is 27720.
Would you like more details or have any questions?
Here are 5 related questions:
- What is the least common multiple of 2, 3, and 5?
- How would the answer change if the range extended to 12?
- What is the greatest common divisor (GCD) of 8 and 9?
- How does prime factorization help in finding LCM?
- What is the difference between GCD and LCM?
Tip: When finding the LCM, always use the highest powers of prime factors from the given numbers.
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Math Problem Analysis
Mathematical Concepts
Number Theory
Least Common Multiple (LCM)
Prime Factorization
Formulas
LCM(a, b, c, ...) = Highest powers of prime factors in each number
Theorems
Fundamental Theorem of Arithmetic
Suitable Grade Level
Grades 6-8
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