If someone says:
How many numbers are a multiple of $10$ between $1$ and $100$? and does not mention whether this is $[1, 100]$ or $(1, 100)$, what is the general consensus in the math world on what this exactly means?
I'm sorry if this is a stupid question but I am unfamiliar with math and am having trouble with conventional norms in the math world.
Edit: This is in a discrete mathematics class.
"Between $a$ and $b$" without qualifications implies "including $a$ and $b$". This is especially true in discrete mathematics, and the sigma-notation $\sum_{k=a}^bf(k)$ is universally understood to include $k=a$ and $k=b$.