Just when I thought I was getting better at math...

[shadowkat]

This

Post by Power 95.3.

made me scratch my head.


7 + 7 divided by 7 +7 x7 -7.

The correct answer is apparently 50.

IF you do it this way: 7+7 =14 divided by 7 =2
2 +7 = 9, 9* 7 =63, 63-7 = 56.

If you do it by calculator = 56

If you do it by Excel = 50

Apparently it is supposed to be 7x7= 49 /7 = 1, then 1+7+7 -7 = 8.
Which still makes no sense. So, it must be = 7x7/7 =1, then 7+7+7 =21 +1
Still makes no sense. I remain puzzled.

This is why I hate math.

Comments

[frenchani.livejournal.com]

There should be brackets!

[shadowkat67.livejournal.com]

My thoughts exactly. I discussed this with a cousin on FB, who is a brilliant mathematician. He told me that it is basically a snobby math trick. If you know the "rules" you get it right and they assume of course everyone remembers the rules.

Then he goes on to explain, how according to the rules, you do what is in the brackets first, if there are no brackets, you do the multiplication and division first, then plug in to the formula adding from left to right.

See? This in a nutshell was why I hate math, and card games. LOL!