SSAT Math Question 134: Answer and Explanation
Home > SSAT Test > SSAT Math Practice Tests
Test Information
- Use your browser's back button to return to your test results.
- Do more SSAT Math Practice Tests.
Question: 134
10. The least common multiple of 20, 24, and 32 is
- A. 240
- B. 480
- C. 960
- D. 1920
Correct Answer: B
Explanation:
The correct answer is (B). The LCM is found by rewriting each number in prime factorization and finding the product of each unique prime factor. 22 and 23 are not selected because each is a factor of 25.
20 = 22 o 5
24 = 23 o 3
32 = 25
LCM = 5 o 3 o 25 = 480
Trial and error can also give you this answer.