# The simple riddle that 50% of Harvard students get wrong

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Sources

Cognitive reflection test

http://emilkirkegaard.dk/en/wp-content/uploads/Shane-Frederick-Cognitive-Re%EF%AC%82ection-and-Decision-Making.pdf

Cognitive reflection test and cognitive biases

http://www.keithstanovich.com/Site/Research_on_Reasoning_files/MC_2011.pdf

Font in cognitive reflection test

http://pages.stern.nyu.edu/~aalter/intuitive.pdf

Fonts in school

https://web.princeton.edu/sites/opplab/papers/Diemand-Yauman_Oppenheimer_2010.pdf

Fonts and cognitive strain

http://rady.ucsd.edu/faculty/seminars/2010/papers/oppenheimer.pdf

source

Because not all harvard degrees mean something, that's why sometimes you'd hear someone say he got "a university_name degree" , excluding the important bit which is what type. They know that it's useless and easy.

I got it right… all i can say now is: neat

Octagon

bat = x

ball = y

bat + ball = 1.1

bat = ball + 1 => bat – ball = 1

x + y = 1.1

x – y = 1

Row reduced echelon form of:

| 1 1 1.1|

| 1 -1 1 |

row2 = row2 + (-1)*row1

| 1 1 1.1|

| 0 -2 -0.1|

row2 = row2 / (-2)

| 1 1 1.1|

| 0 1 0.05|

row1 = (-1)*row2 + row1

| 1 0 1.05|

| 0 1 0.05|

bat = 1.05

ball = 0.05

The first question doesn't make sense. You said that it cost 1 dollar more than the ball not more than 1 dollar? Since there is 1$ difference it would be 1.00$ + 0.5$, but if you had said that the difference between the prices is over 1$ then the answer could be practically

I got it right, but I had to think about it

I guessed five… That make me the more intelligent half of Harvard? Do I get in?

I got it

People reading harder fonts have to spend more time on it, naturally they consume more time and take more time to memorize it.

ok like riddle 2 is soo easy.

5 machines 5 mins 5 widgets

100 machines 5 mins 100 widgets

its not the sum, its the duration :0

in the 3rd riddle:

a patch of lily pads hmm

1

if it takes 48 days to fill the whole lake

but it doubles per day

and it asks how many days will it take to reach half,

then i would say it takes 47 dayes 🙂

AHHH YESS i got it correct right away!

im not a teenager yeti knew that if the base ball is 10 cents then the bat is 110 cents, which doesnt add up to 10

but since 5+5 = 10, then i tryed 0.05 + 1.05 = 1.10

yes!

the 50% are the "diverse" students

One minute is the answer. One machine working one minute makes one widget. Therefore 100 machines, each working one minute, make 100 widgets. Birmingham, MI Middle School and High School Writing and Math Tutor (The other answers are 5 cents, and 46 days.)

I came for a riddle, not this bullshit

Easy . Too easy

I'm literally in vitro and got this right. Due in six weeks. Wish me luck, everyone!

cries heart outi should have answered more carefullyNot $0.55??

Those questions were easy what the hell

But technically there still right

Let x be the cost of bat and y be the cost of ball

x + y = $1.10 (Equation 1)

x – y = $1 (Equation 2)

Subtract the two equations, we get:

2y = $0.10

Therefore, y = $0.05

Is it bad that I said 45c to the bat and ball problem

its the Einstellung effect..

I got all three of them right

20 minutes and 47 days

Roses are red

Violets are blue

I got clickbated

And so do you

i got all these rite and im only 3

I said$0.04 because I was adding taxes I guess if you really think about it I was right

I said 4 cents

500 mins

What was so hard abt thevquestions.. are the masses really that dumb

Ha! I got it right!

I was actually upset when I said 5 right at the beginning and the dude was like you said 10 right? I was saying " NO THAT'S WRONG!"

The bat and ball problem is dumb because it can be any thing .1 cent or .2 cents etc…

the only reason why i thought more about that initial question was because of all the professor layton games ive played recently.