Think Twice

Algebra Level 1

A teacher goes to an aquarium with her 30 students. The admission fee is $3 per person. How much must the teacher pay?


The answer is 93.

Allen Kim by Allen Kim , 21, USA

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7 solutions

Allen Kim
Nov 2, 2014

The teacher needs an admission ticket as well.

2 Helpful 0 Interesting 0 Brilliant 0 Confused

at first i thought that the payment must be shouldered by each person.

Leinard Jan Zaspa - 5 years, 8 months ago
Mehul Arora
Nov 6, 2014

This is a question that is put in the Question Paper of 2nd Graders....

You should have thinked twice Before Adding such a question XD XD

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Most people just directly assume it's 30*3 = 90, hence the name of the title, "Think Twice." It's actually 31, including the teacher, times three, which gives 93. It messes with the fact that we don't read problems too carefully.

How about you think twice before uploading such a shallow reply?

Allen Kim - 6 years, 7 months ago
Denton Young
Aug 27, 2015

My first thought was $3, assuming the students were going to pay their own way. and the teacher only needed to pay for herself. Then once I realized she was footing the bill for everyone, I went, "Oh! add $90 for the kids, so 93."

0 Helpful 0 Interesting 0 Brilliant 0 Confused

I think you achieved the next level of in-depth thinking.

Allen Kim - 5 years, 9 months ago
Noel Lo
Apr 9, 2015

You're right Allen! My first thought was to multiply 30 by 3.

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Ankita Kumari
Feb 11, 2015

the teacher is also going with them. THINK!!!!!!

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Refath Bari
Nov 7, 2014

Solving with proportions: \frac { 1 }{ 31 } =\frac { 3 }{ x } \ 3*31=1x\ 93=x\ x=93 \boxed[93]

0 Helpful 0 Interesting 0 Brilliant 0 Confused

ALONG WITH TEACHER THERE ARE 31 PERSONS SO 31*3=93

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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