Misc: What is the square root of 65536?

Questions

the de beers group of companies controls more than 80% of the world's supply of ______?

circuits can be wired in parallel or ______?

the date of which christian festival was fixed in 325 ad by the council of nicaea?

who fixed the date of the christian festival 'easter'?

when was the date of the christian festival easter fixed by the council of nicaea?