No it is not, just unconventional. It counts the genuses of concatenatedIt's no wonder it eluded me=I don't feel so bad. It's quite clever, but somewhat un-mathematical.
Since @mfb has solved number 3, here comes the next one:
4. In one of three urns there are two white balls, in another a white and a black ball, and in the third two black balls. The urns are labeled: one sign says WW, one WB and the third BB. But someone has switched the signs so that none of them specify the contents of the individual urns anymore.
One may take a ball from one of the urns, one after the other (without looking into the urn) until it is clear which urns contain which of the three ball pairs. How many balls do you have to take out at least to reach this goal?
Open the fridge, take the giraffe out, put the elephant in, close the fridge.
This question investigated whether you are aware of the consequences of your doings.Open the fridge, take the giraffe out, put the elephant in, close the fridge.
Yes, you swim.Oh silly me. The crocs are at the annual get together.
Correct analysis, wrong count.More of a history question - there was no year 0. The last day of 1 BC he was 19 years old, the next day was the first day of 1 AD. The last day of 1 AD he was 20 years old, the last day of 29 AD he was 49 years old -> 49.
The five is wrong. The description of the twenty is not specific enough to be wrong, since it could also mean fifteen years prior to the letter, i.e. relates the dating to the impossible gauge.You find a historic letter dated 5 BC talking about an event that happened 20 BC. What is wrong?
Oops, 48 of course. 20+28 is 48, not 49.Correct analysis, wrong count.
Right. You can make the same puzzle with a letter e.g. 20 AD, but then you need to figure out when the AD counting was introduced (long after that), so the puzzle is easier with BC.The five is wrong.
That dating system did not exist at the time, so that document could not have referred to such dates. So such dates would be a present-day interpretation of whatever dates that it used.You find a historic letter dated 5 BC talking about an event that happened 20 BC. What is wrong?