Math Problem Statement

Find the lowest common multiple (LCM) of the given pairs of numbers on the worksheet.

Solution

Let’s work through the problems to find the lowest common multiple (LCM) for each pair of numbers:

1. 44 and 2222

Prime factors:

  • 4=224 = 2^2
  • 22=2×1122 = 2 \times 11

LCM: 22×11=442^2 \times 11 = 44


2. 66 and 2424

Prime factors:

  • 6=2×36 = 2 \times 3
  • 24=23×324 = 2^3 \times 3

LCM: 23×3=242^3 \times 3 = 24


3. 88 and 66

Prime factors:

  • 8=238 = 2^3
  • 6=2×36 = 2 \times 3

LCM: 23×3=242^3 \times 3 = 24


4. 33 and 44

Prime factors:

  • 3=33 = 3 (prime)
  • 4=224 = 2^2

LCM: 22×3=122^2 \times 3 = 12


5. 1010 and 2323

Prime factors:

  • 10=2×510 = 2 \times 5
  • 23=2323 = 23 (prime)

LCM: 2×5×23=2302 \times 5 \times 23 = 230


6. 22 and 44

Prime factors:

  • 2=22 = 2
  • 4=224 = 2^2

LCM: 22=42^2 = 4


Solutions:

  1. 4,224, 22: 4444
  2. 6,246, 24: 2424
  3. 8,68, 6: 2424
  4. 3,43, 4: 1212
  5. 10,2310, 23: 230230
  6. 2,42, 4: 44

Would you like detailed steps for any of these?

Here are five related questions:

  1. What are the steps for finding the LCM using prime factorization?
  2. How is the LCM used in solving fraction addition?
  3. Can you explain how to find the greatest common divisor (GCD) of two numbers?
  4. How is the relationship between LCM and GCD expressed mathematically?
  5. What are real-world examples where finding the LCM is necessary?

Tip: To quickly estimate LCM, multiply the two numbers and divide by their GCD.

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Math Problem Analysis

Mathematical Concepts

Lowest Common Multiple (LCM)
Prime Factorization

Formulas

LCM(a, b) = (a * b) / GCD(a, b)

Theorems

Fundamental Theorem of Arithmetic

Suitable Grade Level

Grades 5-7