If a number is divisible by both 6 and 8, which of the following must it also be

Practice Questions

Q1
If a number is divisible by both 6 and 8, which of the following must it also be divisible by?
  1. 12
  2. 24
  3. 18
  4. 36

Questions & Step-by-Step Solutions

If a number is divisible by both 6 and 8, which of the following must it also be divisible by?
  • Step 1: Understand what it means for a number to be divisible by another number. A number is divisible by another if you can divide them without leaving a remainder.
  • Step 2: Identify the numbers we are working with: 6 and 8.
  • Step 3: Find the least common multiple (LCM) of 6 and 8. The LCM is the smallest number that both 6 and 8 can divide into evenly.
  • Step 4: To find the LCM of 6 and 8, list the multiples of each number: Multiples of 6 are 6, 12, 18, 24, 30, ... and multiples of 8 are 8, 16, 24, 32, ...
  • Step 5: Look for the smallest number that appears in both lists of multiples. The smallest number is 24.
  • Step 6: Conclude that if a number is divisible by both 6 and 8, it must also be divisible by their LCM, which is 24.
  • Divisibility – Understanding the rules of divisibility and how to determine if a number is divisible by another.
  • Least Common Multiple (LCM) – Calculating the least common multiple of two or more numbers to find common divisibility.
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