Cognitive Reflection Test MCQ

Question 1

The entire cost of a bat and a ball was $1.10. More than $1 is spent on the bat than the ball. What is the price of the ball?

Accepted Answer

5 Cents

Answer

This is a classic riddle designed to test cognitive reflection. If the bat cost $1.00 more than the ball, and the total is $1.10, a common incorrect answer is 10 cents for the ball. However, if the ball is 5 cents, then the bat would be $1.05 ($1.00 more than 5 cents), and their sum is $1.05 + $0.05 = $1.10.

Question 2

How long would it take 100 machines to produce 100 widgets if it takes 5 machines 5 minutes to produce 5 widgets?

Accepted Answer

5 Minutes

Answer

This question tests the understanding of parallel processing. If 5 machines can produce 5 widgets in 5 minutes, it implies that each machine produces one widget in 5 minutes (assuming they work independently and simultaneously). Therefore, if 100 machines are working, each machine will still take 5 minutes to produce its individual widget, resulting in 100 widgets being produced in 5 minutes.

Question 3

There is an area of lily pads in a lake. The patch doubles in size every day. How long would it take the patch to cover half of the lake if it takes 48 days to cover the whole lake?

Accepted Answer

47 Days

Answer

Since the patch of lily pads doubles in size every day, it means that on any given day, it was half the size it will be the next day. If it takes 48 days to cover the whole lake, then on the day before it covered the whole lake (day 47), it must have covered exactly half of the lake. This is a common cognitive reflection test question that often leads to an intuitive but incorrect answer of 24 days.

Question 4

There are twenty-four kids in a classroom. The principal puts in an order for eight pizzas for a pizza celebration on the last day of classes. 12 slices are sliced from each pizza. If the pizza is divided equally among the children, how many slices will each receive?

Accepted Answer

4 Slices

Answer

First, calculate the total number of pizza slices available. With 8 pizzas and 12 slices per pizza, there are 8 * 12 = 96 slices in total. Then, divide the total slices by the number of children: 96 slices / 24 children = 4 slices per child.

Question 5

There are 2,300 applicants aiming for IT jobs at a software company. Over the next two months, 15% of the candidates, according to the firm, will be hired. How many applicants will be given the job?

Accepted Answer

345 Applicants

Answer

To find out how many applicants will be hired, calculate 15% of the total number of applicants. This is done by multiplying 2,300 by 0.15 (which is 15% expressed as a decimal). So, 2,300 * 0.15 = 345 applicants.

Cognitive Reflection Test Practice Test

Cognitive Reflection Test Practice Test

Cognitive Reflection Test MCQ