To see how intuitive thinking works, try the following little test. For each of the three questions, begin by writing down the first answer that comes to your mind. Then pause to reflect. A bat and ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost? You are one of three runners in a race. At the end, you overtake the runner who was in second place. In what place did you finish? Mary’s mother had four children. The youngest three are named: Spring, Summer, and Autumn. What is the eldest child’s name?

