Psychologist Daniel Kahneman has a book called Thinking Fast and Slow. In said book is a riddle that according to Kahneman, even students at prestigious Harvard have struggled to solve.
Apparently more than half of students at some of the leading universities in the world have got the answer wrong! Can you solve it?
If you really can’t guess it, scroll down for the answer!
And here’s what Kahneman had to say:
“A number came to your mind. The number, of course, is 10: 10p,”
“If you do the math, and you will see that the correct answer is 5p.”
“If the ball costs 10p, then the total cost will be £1.20 (10p for the ball and £1.10 for the bat), not £1.10.”
Come on. Fess up. Who got it right?