2. A cat can catch 5 mice in 6 days. How many days will it take for 2 cats to catch 3 mice?
## 2. 5 cats catch 5 mice in 6 days.

Five times fewer cats catch five times fewer mice in the same time:

1 cat catches 1 mouse in 6 days.

Twice as many cats catch twice as many mice in the same time:

2 cats catch 2 mice in 6 days.

The same number of cats catch half as many mice in half the time:

2 cats catch 1 mouse in 3 days.

The same number of cats catch three times as many mice in three times the time:

2 cats catch 3 mice in 9 days.