Intelligence test - part 3

[Mistery]

Link:
http://intelligence-test.net/part3/

[Preslavka]

I need hints for 1,3,11,13,16. Anybody help?

[Mistery]

I figured out everything but 10 and 15.

Here hints for the others:

psychology: when somebody dies

this should be easy, it has to do with the way of the earth around the sun

basics for painters

instrument for time measurement

instrument for space measurement - for the directions

music

humans: eating

maths

sunshine after rain gives a beautiful phenomenon

10????

geometry/shape

hitting keys

attracts metals

mathematical similarity

15??????

theater - famouse writer

maths - unique fact

time measurement

world sport event

rather easy - graphics / our world

[Sammy D]

10 is

something to do with cameras

15 is

lowest math #

that's the best hints i can give

[Mistery]

Thanks, got them now.
But I struggled for 15!

[Sammy D]

yeah wasn't sure how to hint that one maybe you have a better hint for it

[Mistery]

yeah wasn't sure how to hint that one maybe you have a better hint for it

Well, I guess your hint was good. I mean you have to know the expression. Maybe an addition

ancient Greeks

because they defined them.
But if you don't know the expression then you can't use the hints...

[Sammy D]

this could work better i think

a lower number not flawed

what ya think

[Sammy D]

i am still bloomin lost on # 1

[Mistery]

Lol!
Or

exchange two letters in a Latin official ;-)