### Another puzzle

Those who enjoyed solving 100 pirates will want to take a look at the 2 Numbers puzzle, on Naught Much. Other people's solutions are in the comments, so be sure not to cheat!

Elias.

Elias.

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Those who enjoyed solving 100 pirates will want to take a look at the 2 Numbers puzzle, on Naught Much. Other people's solutions are in the comments, so be sure not to cheat!

Elias.

Elias.

This book was given me as a gift by my sister-in-law, an educator and avid reader. It is the autobiography of a famous actress and UNICEF Goodwill Ambassador. The book concentrates on a short period of time when the author attended Tomoe primary school in Tokyo. In fact, the book is more a description of the school founder's practice than it is a life story.

A colleague gave me this puzzle yesterday. It is very cool.

Rearrange the sticks on the left hand side of the equal sign, so the sum does equal 4.

| + || + ||| = 4

Note: The plus signs are also made up of sticks.

Post your answers in the comments field.

Elias.

Technorati tags: Technorati tags: PuzzleMathematics

Rearrange the sticks on the left hand side of the equal sign, so the sum does equal 4.

| + || + ||| = 4

Note: The plus signs are also made up of sticks.

Post your answers in the comments field.

Elias.

Technorati tags: Technorati tags: PuzzleMathematics

## Comments

v good

what about this?

using algebra to prove that

1= 0

Let x = y. (x,y are nonzero)

Then x2 = xy.

Subtract the same thing from both sides:

x2 - y2 = xy - y2.

Dividing by (x-y), obtain

x + y = y.

Since x = y, we see that

2y = y.

Thus 2 = 1, since we started with y nonzero.

Subtracting 1 from both sides,

1 = 0.

what is wrong with this theory?

If x = y, then x - y = 0

You cannot divide by (x - y) since you cannot divide by 0.