Question

Determine the number greater than 19 and less than 34 that is divisible by 6 and 10.(1 point)
Responses

20
20

30
30

24
24

60
60
Skip to navigation
page 20 of 20

1 answer

To find a number greater than 19 and less than 34 that is divisible by both 6 and 10, we first need to determine the least common multiple (LCM) of these two numbers.

  1. Find the LCM of 6 and 10:

    • The prime factorization of 6 is \(2^1 \times 3^1\).
    • The prime factorization of 10 is \(2^1 \times 5^1\).
    • The LCM will take the highest power of all prime factors involved:
      • \(2^1\), \(3^1\), \(5^1\).
    • Thus, the LCM is: \[ LCM(6, 10) = 2^1 \times 3^1 \times 5^1 = 30 \]
  2. Determine if this number is within the given range:

    • We need to check if 30 is between 19 and 34:
    • Yes, \(19 < 30 < 34\).

Therefore, the number that is greater than 19 and less than 34 that is divisible by both 6 and 10 is 30.