Julia goes running every 4 days and weight lifts every 3 days. How many days until she will run and lift on the same day?

Answer 1

To find out when Julia will run and lift on the same day, we need to find the least common multiple of 4 and 3.

Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, ...
Multiples of 3: 3, 6, 9, 12, 15, 18, 21, 24, ...

The least common multiple of 4 and 3 is 12. Therefore, Julia will run and lift on the same day every 12 days.