Practice Test

Cognitive Reflection

The classic test of whether you can override a quick, intuitive (but wrong) answer with a considered one.

0 of 3 answered⏱ 0:00

1. A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?
2. If it takes 5 machines 5 minutes to make 5 widgets, how long would 100 machines take to make 100 widgets?
3. A patch of lily pads doubles in size every day. It takes 48 days to cover the whole lake. How long to cover half the lake?