What is the sum of the units digits of all the multiples of $3$ between $0$ and $50$?
Question:
What is the sum of the units digits of all the multiples of $3$ between $0$ and $50$?
Answer:
Let's think step by step.

user
78
What is the sum of the units digits of all the multiples of $3$ between $0$ and $50$?
train