I am employed,I am volunteering,I am retired
I am employed,I am volunteering,I am a student
I am unemployed,I am volunteering,I am a student
I am employed,I am unemployed,I am volunteering

1) Widgets
5 minutes (assuming they are all the right type of machine!)
Depends on the time taken into consideration
100 despite you didn't clarify how long it took
1 machine take 5 minutes to make a widget - so if you start the machines at the same time then 5 minutes

3) Running a race
Depends on if I passed the 2nd person and went ahead or her went ahead of me
It depends if I still need to lap that person.
1st assuming I wasn't lapped before hand

4) Lake and lily pads
47? If it doubles, then the next day it covers the whole lake then half of that is half a lake
It would depend on the size of the lilly pads.
Depends on size of the lake and size of patch

5) Farmer sheep
8 sheep (if "left" implies how many are living)

6) Barrel of water
Together they drink 3/12ths per day. To drink 12/12ths would therefore take 4 days
3 days because then they will be drinking together from the same barrel, so it will empty faster
Awww man... I would say 9 but probably not correct
I have no idea. It's too abstract for me ^^
cannot determine, other factors may affect
If they share the water 50:50 then 6 days. It will take John 3 days to drink his share and it would take Mary 6 days to drink her share.

7) Students in class
There are 14 better than him and 14 worse than him so altogether there must be 29 including Jerry

8) Emily puzzle
Had is past tense, so the third daughter is deceased, but would have been June?
depends on what month the child was borned
Who knows? Not enough info. But, a guess would be June.
Emily. You nearly caught me out there haha
June if he continues to use the name of the month.
I don't know (June if following the pattern)
June? Depends on when the daughter was born because assuming he's naming them after their birthday

9) Pig puzzle
He spends a total of Œ£140 and get a total of Œ£160 - so the profit is Œ£20

10) Dirt in a hole
zero - if it was filled with dirt it wouldn't be a hole (although it could hold 27 cubic feet)
? I'm foreign and don't use feet and inches
Hole will not have dirt. Nothing can be contained in a hole.
sorry i am not a feet country so unable to answer this
Not use as I only know the metric system

2) Magazine banana control item
90p. Or could be more on its own if 2.90 is a special?
Not sure of the foreign money your using
90 (Im American not sure about exchange rate)
0.90 unless there was a discount for the two.
0.90, unless there is a promotion for getting a magazine with a banana, so the banana costs more alone.

Numbers of puzzles seen before
How long does it take to cover half the lake
1, 5 and 8 seemed a familiar format, though names were different.
Mostly all, not exactly but similar kind
all except 10 & 11, which i've seen with different numbers
5 and 8, though possibly worded differently (different names and/or animals)
since im not a native speaker im not sure if i understood number 5 correctly. I ve remembered the answer to 1 question, and have seen about 3 others in school.