WoodCentral Forums

Est. 1998 — 27 years of woodworking knowledge

Friday Trivia/Puzzle

Posts

Friday Trivia/Puzzle

#1

Friday Trivia/Puzzle

You need to measure out some gold dust to pay for your new cabinet saw (woodworking relevance added).

You are given the following:

A more-than-sufficient pile of gold dust of a purity that sells for $800/ounce.

Two beakers of exactly the same mass, neither graduated, one of which holds 5 ounces, and one 3 ounces.

As much water as you want.

A balance scale that you are only allowed to use for one balancing.

Can you measure the gold required to pay for your new $3,200 saw?

How (or why not)?

Re: Friday Trivia/Puzzle

#2

Two clarifications

Probably already assumed, but just to keep anyone from going down an offbeat track:

The capacity of the beakers is given in fluid ounces, not ounces of gold that will fit in them!

The water available is standard specific gravity of eight pounds per gallon.

Re: Friday Trivia/Puzzle

#3

Re: Friday Trivia/Puzzle

Not Troy I think. ;)

Re: Friday Trivia/Puzzle

#4

That trap didn't catch many :-(

Re: Friday Trivia/Puzzle

#5

Short by $566.86 ;)

Re: Friday Trivia/Puzzle

#6

I get 283.33 shortfall -- solution explanation

But we are in agreement on the solution.

1 Troy ounce (used for precious metals) = 480 grains

1 Avoidupois ounce (the common ounce used for "normal" measure) = 437.5 grains

4oz(A) = 4*437.5/480 oz(T)

I tried to hide this puzzle in the beaker puzzle, without much success. Another version is "Which weighs more, an ounce of gold or an ounce of feathers?"

Re: Friday Trivia/Puzzle

#7

My take

Fill both containers with water, find a chair, sit back and relax, drink the water and wait until tomorrow because the gold will be woorth a lot more by noon.

Re: Friday Trivia/Puzzle

#8

Re: Friday Trivia/Puzzle

Yes

Albebra

👍 This page answered my questions

Your vote helps other woodworkers quickly find the answers and techniques that actually work in the shop.