I have been reading a wonderful book on trading psychology.
Answer these questions.
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? _____ cents
2. If it takes 5 machines to make 5 widgets in 5 minutes, how long would it take
100 machines to make 100 widgets? _____ minutes