Was reading a World Bank Report,"Mind,Society and Behavior" in a chapter there is mention our methods of thinking,there is a quotation as the above.
Any one interested click on link for a copy
http://www.worldbank.org/en/publication/wdr2015
Test your Thinking Skills.
A bat and ball cost $1.10.The bat cost $1.00 more than the ball.
How much does the ball cost ?