Cognitive Reflection Test Basic 3

Question 1

A man buys a pig for $60, sells it for $70, buys it back for $80, and sells it again for $90. How much profit did he make?

Accepted Answer

$20

Answer

He gains $10 on the first sale and $10 on the second, for $20 total profit.

Question 2

Which system of thinking, per dual-process theory, produces the wrong intuitive CRT answers?

Accepted Answer

System 1 (fast, automatic)

Answer

System 1's fast, automatic responses generate the tempting but incorrect CRT answers.

Question 3

If it takes 8 painters 8 hours to paint 8 walls, how long would 4 painters take to paint 4 walls?

Accepted Answer

8 hours

Answer

Each painter paints one wall in 8 hours, so 4 painters paint 4 walls in 8 hours.

Question 4

A frog falls into a 30-foot well, climbs 3 feet each day but slips 2 feet each night. How many days to escape?

Accepted Answer

28 days

Answer

It gains 1 foot per full day but on day 28 climbs 3 feet from 27 to 30 and escapes before slipping.

Question 5

Emily's father has three daughters named April, May, and ___?

Accepted Answer

Emily

Answer

The third daughter is Emily herself, as stated at the start of the riddle.

Cognitive Reflection Test Practice Test