The world's shortest IQ test will reveal how average your intelligence is in 3 questions

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carolinakid

carolinakid

Joined
Oct 20, 2021
Messages
37,754
IQ tests offer a formula that allows you to compare yourself to other people and see how average (or above average) your intelligence is.

The Cognitive Reflection Test (CRT) is dubbed the world’s shortest IQ test because it consists of just three questions. It assesses your ability to identify that a simple problem can actually be harder than it first appears. The quicker you do this, the more intelligent you appear to be.


Here are the three questions:

1. A bat and a ball cost £1.10 in total. The bat costs £1.00 more than the ball. How much does the ball cost?

2. If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets?

3. In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

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Here is what a lot of people guess:

1. 10 pence

2. 100 minutes

3. 24 days

These answers would be wrong.

When you're ready, scroll down for the correct answers, and how you get to them:

1. The ball would actually cost 5 pence or 0.05 pounds

If the ball costs X, and the bat costs £1 more, then it will be:

X+£1

Therefore


Bat+ball=X + (X+1) =1.1

Thus

2X+1=1.1, and 2X=0.1

X= 0.05

2. It would take 5 minutes to make 100 widgets.

Five machines can make five widgets in five minutes; therefore one machine will make one widget in five minutes too.

Therefore if we have 100 machines all making widgets, they can make 100 widgets in five minutes.

3. It would take 47 days for the patch to cover half of the lake

If the patch doubles in size each day going forward, it would halve in size going backwards. So on day 47, the lake is half full.

In a survey of almost 3,500 people, 33 per cent got all three wrong, and 83 per cent missed at least one.

While this IQ test has its shortcomings – its brevity, and lack of variation in verbal and non-verbal reasoning - only 48 per cent of MIT students sampled were able to answer all three correctly.
 

KVB

KVB

Joined
Apr 11, 2023
Messages
9,049
Common man.

People only getting any of them wrong because they aren't thinking about it.

The questions are not hard, they are very simple.

I wonder how many people even read the question more than once for what it's asking, instead of just going over the info.

Common, man.
 

samsncharge99

samsncharge99

Joined
Sep 30, 2022
Messages
9,842
I got all 3 correctly not hard at all, was hoping for more of a challenge. I don’t consider myself to be a smart guy either I just have a lot of common sense and self-awareness.
This 100%

DEI aka didnt earn it in woke america doesnt care about grades

Just check marking the box

Personally i dont give a fukk who saves my life as long as they are qualified to do so
 

RRsilver

RRsilver

Joined
Nov 2, 2021
Messages
4,235
People look at and think about reasoning in different ways,

1).First thing I did was think of it as 110. If bat is 100 ball is 10= only 90 more
Move up 5 points to 105 for bat leaves 5 for ball =110 convert back to 1.10
1.10-.05=1.00
exactly Ball=.05

2) 5 machines 5 minutes 5 widgets. Takes every machine 5 min to make one.

100 machines for 5 mins. =100 widgets
5mins.

3) Like you said work in reverse order only went past 1/2 to confirm my math.

48=100%
47=50%
46=25%
45=12.5%
44=6.25%

Got all 3, but I took more time than needed to read more than once, to make sure it was not a trick question, and I was not missing anything.
 

djefferis

djefferis

Joined
Jan 8, 2024
Messages
968
Got 2 and 3 right

Missed first - as mentioned tried to speed through it and not stop and think.

IQ test are useful to demonstrate what kind of thinker you are - but intelligence overall is overrated.

You can be extremely smart and poor - likewise you can be a complete dumbass and both rich and successful. Very few are both super intelligent and successful/wealthy. I am neither overly intelligent nor street smart - yet I do alright.
 
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