I've been trying to figure out these logic puzzles for ages but have not succeeded. I'd really appreciate it if someone could help me out. Thanks, Josh.
Logic - 1
You have 100 gold coins and 2 bags.
You must put all coins to those 2 bags, and one bag must contain twice coins than another.
You can't brake, steal, melt, barter, change or do something like to those coins.
The only operation you can do with coins is to put coin to one or another bag.
Logic - 2
Please, divide twelve to two equal parts, and one part must be equal to seven.
Logic - 3
You have two ropes. You know that each will burn exactly in 60 minutes, but burn speed is not linear (for example one half of rope can burn in 2 minutes, the rest - in 58 mins). The ropes are not identical.
You need to measure 45 minutes using those ropes and any fire source (clock with integrated lighter - excluded).
Logic - 4
You have 10 marked bags with coins. You are short in time and bags are huge. You know, that in 9 bags all coins are true coins, and in one bag all coins are spurious.
The only way you can separate spurious coins from true one is weigh.
(You know, that true coin weigh is 10g and spurious coin weigh is 11g).
So you have tool... the electonic weighing-machine (with one scale).
And you can weight only one time.
Now explain me, how you will decide in which bag are false(spurious) coins.
Here are some pairs: animal - number:
cow - 3
sheep - 3
pig - 4
cat - 4
duck - 5
mouse - 6
snake - ?
cock - ?
Correct answer must include the numbers and explanation.
Good luck, Josh.