The Confidence Test- The Science of Irrationality

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logbutcher

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The following was used, along with a battery of mental, psychological, and dead serious physical challenges for entry to our unit training. Only 5% passed all entry requirements.
Answer it quickly without calculator, Google, or pencil and paper. It is not a "trick question". You will win nothing.

"A ball and bat both cost $1.10. The bat costs $1.00 more than the ball. What is the cost of the ball ? "
 
"A ball and bat both cost $1.10. The bat costs $1.00 more than the ball. What is the cost of the ball ? "

Both as together or both as each?

.10$

If i'm already questioning it does that mean my confidence is low?
 
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logbutcher said:
The following was used, along with a battery of mental, psychological, and dead serious physical challenges for entry to our unit training. Only 5% passed all entry requirements.
Answer it quickly without calculator, Google, or pencil and paper. It is not a "trick question". You will win nothing.

"A ball and bat both cost $1.10. The bat costs $1.00 more than the ball. What is the cost of the ball ? "
Click to expand...

If the combined total in your original statement is $1.10, then the ball is worth $0.05.

However, if the combined total in your original statement is $2.20 (as in $1.10 per each), then the ball is worth $0.60.
 
So this thread wont get moved I'll ask a Firewood, Heating and Wood Burning Equipment question. Is the bat made out of ash or maple?
 
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Johny you'd better check your math. Add $1 to the $.10 and the bat alone would cost $1.10 thus both together $1.20
 
First of all... I wanna know where I can get a bat & a ball for so cheap. I’ll buy a few dozen.

In any case, the problem is quite simple. Let’s see... Assuming the bat is a Louisville Slugger R43 with a "cup-balanced" head, made from Ash at 8,000 BTU per Lbs @ 5% humidity. We will then assign a weight of 1.93 Lbs = 15,440 BTU. For the purpose of this exercise we will not assign a BTU Value to the ball since if we find the value of one we can automatically assume the value of the other. Duh!

Now we need to decide if in the test protocol we will use the ‘wet’ or ‘dry’ value of the BTU. I go for wet since it reminds me of beer. Then, lab time is about $360 an hour for 4 hrs worth of testing. The answer quite obviously is (drum roll).............$1,480 (lab time and beer)!

Of course there’s many more variable we could factor in but you did state it was not a trick question.

Ps. Let me know if its an aluminum bat. I’ll have to rework all my figures and up my beer budget.
 
Look deep into the little grey matter.

Ash or maple, don't matter. Butt: for those of us making our own tool handles, it's the grain that counts, not always the species.
Some like white ash, some sugar/hard/rock maple.

The operative word here is how we ASSume being right, and are unable and unwilling to check assumptions at the door of rationality. Whew.:msp_w00t:
 

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