The coins was easy.
Next puzzle:
If today is 0 degrees and tomorrow is twice as cold, what will be the temperature tomorrow?
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Thing about the coin is that most ppl go for the hardest way, which is using all 3 coins, so they usually need 2 tries.
Depends on what kind of degrees you are talking about. If it is °C the answer would be 273°C, which is just double the absolute temperature measured in Kelvin.
I do not know a new riddle from the top of my head. I just paste an easy one:
What can you catch but not throw?
Oh and I finally got the postman one!
9, 2, 2!
edit- Nope read the question wrong, still don't get it. 
Originally posted by Jeffers16
Oh and I finally got the postman one!9, 2, 2!
edit- Nope read the question wrong, still don't get it.
+1 for explaination
Originally posted by s1m0nmp
If the mailman knew the number of the houses (which i guess he knows as he is a mailman afterall) than he would be able to give correct and exact answer. On the other side you have a set of solutions (first always being the eldest daughter):36x1x1
18x2x2
12x3x1
9x4x1
9x2x2
6x3x2
4x3x3....IF ONLY YOU AND DEAD PEOPLE CAN READ HEXADECIMAL, THAN HOW MANY PEOPLE CAN READ HEXADECIMAL?
1 Person can read hexadecimal.
Originally posted by advola
Originally posted by Jeffers16
Oh and I finally got the postman one!9, 2, 2!
edit- Nope read the question wrong, still don't get it.
+1 for explaination
list all available options.
Sum all ages. If you were a postman, you knew the house # and could give answer right away.You can not give answer only in one case, when sum of ages are equals:9 +2 + 2 = 13
6 +6 +1 = 13because postman is missing information, house number is 13.
Professor gives hint which eliminates 6 6 1 (eldest daughter is only one)
Originally posted by advola
Originally posted by Jeffers16
Oh and I finally got the postman one!9, 2, 2!
edit- Nope read the question wrong, still don't get it.
+1 for explaination
So this is the solution to the postman riddle. He obviously knows the house number. When he says that he still needs more info he says to us that the house number has more than one possible combination. The only combination of numbers that adds to the same number is 9,2,2 and 6,6,1 which sums to 13. The moment he gets to know that one daughter is older then the other two he knows the right answer.
Smart ass postman Indeed!
Originally posted by Curtold
Originally posted by s1m0nmp
If the mailman knew the number of the houses (which i guess he knows as he is a mailman afterall) than he would be able to give correct and exact answer. On the other side you have a set of solutions (first always being the eldest daughter):36x1x1
18x2x2
12x3x1
9x4x1
9x2x2
6x3x2
4x3x3....IF ONLY YOU AND DEAD PEOPLE CAN READ HEXADECIMAL, THAN HOW MANY PEOPLE CAN READ HEXADECIMAL?
1 Person can read hexadecimal.
not exactly... the answer is a bit higher 
Originally posted by s1m0nmp
Originally posted by Curtold
Originally posted by s1m0nmp
If the mailman knew the number of the houses (which i guess he knows as he is a mailman afterall) than he would be able to give correct and exact answer. On the other side you have a set of solutions (first always being the eldest daughter):36x1x1
18x2x2
12x3x1
9x4x1
9x2x2
6x3x2
4x3x3....IF ONLY YOU AND DEAD PEOPLE CAN READ HEXADECIMAL, THAN HOW MANY PEOPLE CAN READ HEXADECIMAL?
1 Person can read hexadecimal.
not exactly... the answer is a bit higher
57 006 people. HEX "DEAD" = 57 005 DEC.