In a classroom, if the number of students is a multiple of both 4 and 6, which o

Practice Questions

Q1
In a classroom, if the number of students is a multiple of both 4 and 6, which of the following could be the number of students?
  1. 20
  2. 24
  3. 30
  4. 36

Questions & Step-by-Step Solutions

In a classroom, if the number of students is a multiple of both 4 and 6, which of the following could be the number of students?
  • Step 1: Understand that we need to find a number that is a multiple of both 4 and 6.
  • Step 2: Find the least common multiple (LCM) of 4 and 6.
  • Step 3: To find the LCM, list the multiples of 4: 4, 8, 12, 16, 20, 24, ...
  • Step 4: List the multiples of 6: 6, 12, 18, 24, 30, ...
  • Step 5: Identify the smallest number that appears in both lists. The smallest number is 12.
  • Step 6: Since 12 is the LCM, any multiple of 12 will also be a multiple of both 4 and 6.
  • Step 7: Examples of multiples of 12 are 12, 24, 36, 48, ...
  • Step 8: Check if 24 is a multiple of 12. Yes, it is (12 x 2 = 24).
  • Step 9: Therefore, 24 could be the number of students in the classroom.
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