It’s not a problem, it’s a puzzle: Here are some clues; can you figure out what number I’m thinking of? Are you thinking what I’m thinking?

]]>http://brainly.com/question/196483.

Its solution begins:

Let x = Class A

Let y = Class B

Let z = Class C

Equations from problem:

x – 160 = y

2/3x = z

y + 92 = z

All 3 Equations from problem are wrong.

Answer 44 paper cranes in class B, is clearly wrong. Since Class A folds 160 fewer paper cranes than Class B, clearly Class B must have at least 160 paper cranes.

Of course, for a Grade 5 class, students do not know Algebra.

An Arithmetic solution can be easily obtained using the Singapore Math bar diagrams. See

“Solving Algebra and Other Story Problems with Simple Diagrams: a Method Demonstrated in Grade 4–6 Texts Used in Singapore” by Sybilla Beckmann, a mathematician at the University of Georgia. Find this report at

http://math.coe.uga.edu/tme/issues/v14n1/v14n1.Beckmann.pdf

“8. A child is watching a film, in which a person reading a book encounters a description of an eighth-grader taking a Regents exam, whose final question refers to four students playing a math game at home…”

]]>Class A folds 160 fewer paper cranes than Class B and 2/3 as many as Class C. Class B folds 92 more paper cranes than Class C. How many paper cranes does Class B fold?

At this point I’m thinking “who cares?” A friend said that she wouldn’t know because she would be too busy folding paper cranes herself.

It just makes me wonder what the ultimate goal of this question is. Does it really need to be that detailed and complicated? I know everything is working toward being “real world centered” but this problem does not seem very real world to me.