Bat and ball
A bat and a ball together cost $1.10
The bat costs one dollar more than the ball
how much does the ball cost?
The vast majority of people say 10 cents. The answer is 5 cents. Our intuition tells us that the ball costs 10 cents.
Why does this error occur? Mode 2 is lazy and the Fast Mode kicks in automatically with the incorrect answer – you need algebra to get the correct answer – the slow mode needs to be engaged with visual thinking: