What is the sum of 15 and 27?

To determine the sum of 15 and 27, you simply add these two numbers together.

Starting with 15, you can visualize it as a base amount. After that, adding 27 means you are increasing this base amount. The addition can be broken down as follows:

• First, adding 10 from 27 to 15 gives you 25.

• Then, adding the remaining 17 (since 27 can be thought of as 10 + 17) to 25 equals 42.

Therefore, when you sum 15 and 27 together, the result is indeed 42. This confirms that the correct answer is the sum itself, which is 42.