Final answer:
The least common multiple (LCM) of 10 and 40 is 40, as it is the smallest number that both 10 and 40 can divide evenly into. The correct answer to the question is d) 40.
Step-by-step explanation:
The least common multiple (LCM) of two numbers is the smallest number that is a multiple of both numbers. To find the LCM of 10 and 40, we can list the multiples of each:
- Multiples of 10: 10, 20, 30, 40, 50, ...
- Multiples of 40: 40, 80, 120, ...
We can see that the first common multiple of both 10 and 40 is 40 itself. Therefore, the least common multiple of 10 and 40 is 40.
In conclusion, the mentioned correct answer in the final answer options given is d) 40.