If we count the numbers 10, 20, 30, … up to 120, how many numbers do we count?

Step-by-step solution

1. Identify that the sequence is multiples of 10: $10,20,30,dots$
2. To find the count, divide the largest term by 10: $120div10=12$.
3. Thus we count 12 numbers in this list.

Concept tested: Counting multiples of ten up to a limit

Published 10 October 2026 · How this solution was prepared and checked